diff --git a/.gitattributes b/.gitattributes
index a74ffee4bb8..58122fe6484 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -2605,6 +2605,34 @@ Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.h -text
 Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.ui -text
 Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/data/oneH.xyz -text
 Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/data/oneK.xyz -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/ball.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/camera.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clipping.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clippingOff.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/conflict.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/cover1.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/cover27.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/fileOpen.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/init0.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/init1.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/initGrid.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/initRand.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/initRandPlanar.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/inputPointBall.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/inputPointRandom.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/license.txt -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/locate.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/multiple.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/multipleOff.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/pause.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/planar.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/play.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/twoColorClipping.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/wireframe.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/wireframeOff.png -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/CGAL.gif -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about.html -text
+Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about_CGAL.html -text
 Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3/offsets.eps -text
 Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3/offsets.gif -text
 Periodic_3_triangulation_3/doc_tex/Periodic_3_triangulation_3/offsets.pdf -text
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/CMakeLists.txt b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/CMakeLists.txt
index 520520a9745..912fbe39146 100644
--- a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/CMakeLists.txt
+++ b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/CMakeLists.txt
@@ -34,8 +34,13 @@ if (CGAL_FOUND AND OPENGL_FOUND AND QT4_FOUND AND QGLVIEWER_FOUND)
 
    include_directories( ${QGLVIEWER_INCLUDE_DIR} )
 
+  # UI files (Qt Designer files)
   qt4_wrap_ui ( UI_FILES MainWindow.ui )
 
+  # qrc files (resource files)
+  qt4_add_resources( RESOURCE_FILES ./Periodic_3_triangulation_3.qrc )
+
+  # use the Qt MOC preprocessor on classes that derive from QObject
   qt4_generate_moc ( Scene.h moc_Scene.cpp )
   qt4_generate_moc ( MainWindow.h moc_MainWindow.cpp )
 
@@ -44,10 +49,12 @@ if (CGAL_FOUND AND OPENGL_FOUND AND QT4_FOUND AND QGLVIEWER_FOUND)
   include_directories( ${QT_INCLUDE_DIR} )
   include_directories( ../../include )
 
+  # The executable itself
   add_executable  ( periodic_3_triangulation_3_demo
   		    Scene.cpp moc_Scene.cpp
   		    periodic_3_triangulation_3_demo.cpp
-  		    MainWindow.ui moc_MainWindow.cpp )
+  		    MainWindow.ui moc_MainWindow.cpp 
+		    ${UI_FILES} ${RESOURCE_FILES})
 
   # Link the executable to CGAL and third-party libraries
   target_link_libraries(periodic_3_triangulation_3_demo ${CGAL_LIBRARIES} ${CGAL_3RD_PARTY_LIBRARIES} ${QT_LIBRARIES} ${QGLVIEWER_LIBRARIES} ${OPENGL_gl_LIBRARY} ${OPENGL_glu_LIBRARY} )
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.h b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.h
index 3442ea3cd31..fce302bf2c0 100644
--- a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.h
+++ b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.h
@@ -1,5 +1,7 @@
 #include <QtGui/QMainWindow>
 #include <QtGui/QMessageBox>
+#include <QFile>
+#include <QTextStream>
 #include "Scene.h"
 
 class MainWindow : public QMainWindow
@@ -86,6 +88,8 @@ public:
     // Help menu:
     connect(ui->actionDemo_Help, SIGNAL(triggered()),
             this, SLOT(help()));
+    connect(ui->actionAbout_CGAL, SIGNAL(triggered()),
+            this, SLOT(about_CGAL()));
     connect(ui->actionAbout, SIGNAL(triggered()),
             this, SLOT(about()));
 
@@ -102,25 +106,22 @@ public slots:
   }
   
   void about() {
+    QFile about("resources/about.html");
+    about.open(QIODevice::ReadOnly);
     QMessageBox mb(QMessageBox::NoIcon,
 	"About the demo...",
-	"<html>\n\
-          <body>\n\
-            <h2>3D Periodic Triangulations</h2>\n\
-            <p>Copyright &copy;2008-2009<br>\n\
-              <a href=\"http://www-sop.inria.fr/\">\
-                INRIA Sophia Antipolis - Mediterranee\
-              <a/>\n\
-            </p>\n\
-            <p>This application illustrates the 3D Periodic Delaunay\
-              Triangulations of <a href=\"http://www.cgal.org/\">CGAL</a>.\
-            </p>\n\
-            <p>See also the package manual:<br>\n\
-              <a href=\"http://www.cgal.org/Pkg/Periodic_3_triangulation_3\">\
-              3D Periodic Triangulations</a>\
-            </p>\n\
-          </body>\n\
-        </html>",
+	QTextStream(&about).readAll(),
+	QMessageBox::Ok,
+	this);
+    mb.exec();
+  }
+
+  void about_CGAL() {
+    QFile about("resources/about_CGAL.html");
+    about.open(QIODevice::ReadOnly);
+    QMessageBox mb(QMessageBox::NoIcon,
+	"About CGAL...",
+	QTextStream(&about).readAll(),
 	QMessageBox::Ok,
 	this);
     mb.exec();
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.ui b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.ui
index c54c0ac8ff0..39a812b1265 100644
--- a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.ui
+++ b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/MainWindow.ui
@@ -5,17 +5,30 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>415</width>
-    <height>389</height>
+    <width>1566</width>
+    <height>713</height>
    </rect>
   </property>
+  <property name="sizePolicy" >
+   <sizepolicy vsizetype="Preferred" hsizetype="Preferred" >
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
   <property name="windowTitle" >
    <string>CGAL Periodic Delaunay Triangulation</string>
   </property>
   <widget class="QWidget" name="centralWidget" >
-   <layout class="QHBoxLayout" >
+   <layout class="QVBoxLayout" name="verticalLayout" >
     <item>
-     <widget class="QGLViewer" name="viewer" />
+     <widget class="QGLViewer" name="viewer" >
+      <property name="sizePolicy" >
+       <sizepolicy vsizetype="Preferred" hsizetype="Preferred" >
+        <horstretch>0</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+     </widget>
     </item>
    </layout>
   </widget>
@@ -24,7 +37,7 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>415</width>
+     <width>1566</width>
      <height>22</height>
     </rect>
    </property>
@@ -92,6 +105,7 @@
     <addaction name="actionDemo_Help" />
     <addaction name="separator" />
     <addaction name="actionAbout" />
+    <addaction name="actionAbout_CGAL" />
    </widget>
    <addaction name="menuFile" />
    <addaction name="menuInitialization" />
@@ -101,7 +115,44 @@
    <addaction name="menuHelp" />
   </widget>
   <widget class="QStatusBar" name="statusBar" />
+  <widget class="QToolBar" name="toolBar" >
+   <property name="windowTitle" >
+    <string>toolBar</string>
+   </property>
+   <attribute name="toolBarArea" >
+    <enum>TopToolBarArea</enum>
+   </attribute>
+   <attribute name="toolBarBreak" >
+    <bool>true</bool>
+   </attribute>
+   <addaction name="actionLoad_Points" />
+   <addaction name="actionGrab_image" />
+   <addaction name="separator" />
+   <addaction name="actionEmpty_scene" />
+   <addaction name="actionSingle_Point" />
+   <addaction name="actionRandom_Point_Set" />
+   <addaction name="actionRandom_Points_in_Plane" />
+   <addaction name="actionPoint_grid" />
+   <addaction name="separator" />
+   <addaction name="actionPause" />
+   <addaction name="actionFlying_ball" />
+   <addaction name="separator" />
+   <addaction name="actionPoint_location" />
+   <addaction name="actionConflict_region" />
+   <addaction name="separator" />
+   <addaction name="actionWireframe" />
+   <addaction name="actionPlanar_triangulation" />
+   <addaction name="separator" />
+   <addaction name="actionDraw_1_sheeted_covering" />
+   <addaction name="actionDraw_bordering_cells_multiply" />
+   <addaction name="actionClip_along_the_cube_square" />
+   <addaction name="action2_color_clipping" />
+  </widget>
   <action name="actionLoad_Points" >
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/fileOpen.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/fileOpen.png</iconset>
+   </property>
    <property name="text" >
     <string>Load Points</string>
    </property>
@@ -121,6 +172,11 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/wireframe.png</normaloff>
+     <normalon>:/cgal/Periodic_3_triangulation_3/icons/wireframeOff.png</normalon>:/cgal/Periodic_3_triangulation_3/icons/wireframe.png</iconset>
+   </property>
    <property name="text" >
     <string>Wireframe</string>
    </property>
@@ -135,6 +191,10 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/planar.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/planar.png</iconset>
+   </property>
    <property name="text" >
     <string>Planar triangulation</string>
    </property>
@@ -152,6 +212,11 @@
    <property name="checked" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/cover1.png</normaloff>
+     <normalon>:/cgal/Periodic_3_triangulation_3/icons/cover27.png</normalon>:/cgal/Periodic_3_triangulation_3/icons/cover1.png</iconset>
+   </property>
    <property name="text" >
     <string>Draw 1-sheeted covering</string>
    </property>
@@ -169,6 +234,11 @@
    <property name="checked" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/multiple.png</normaloff>
+     <normalon>:/cgal/Periodic_3_triangulation_3/icons/multipleOff.png</normalon>:/cgal/Periodic_3_triangulation_3/icons/multiple.png</iconset>
+   </property>
    <property name="text" >
     <string>Draw bordering cells multiply</string>
    </property>
@@ -183,6 +253,11 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/clipping.png</normaloff>
+     <normalon>:/cgal/Periodic_3_triangulation_3/icons/clippingOff.png</normalon>:/cgal/Periodic_3_triangulation_3/icons/clipping.png</iconset>
+   </property>
    <property name="text" >
     <string>Clip along the cube/square</string>
    </property>
@@ -194,6 +269,10 @@
    <property name="enabled" >
     <bool>false</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/twoColorClipping.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/twoColorClipping.png</iconset>
+   </property>
    <property name="text" >
     <string>2-color clipping</string>
    </property>
@@ -202,9 +281,16 @@
    </property>
   </action>
   <action name="actionPoint_grid" >
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/initGrid.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/initGrid.png</iconset>
+   </property>
    <property name="text" >
     <string>Point grid</string>
    </property>
+   <property name="iconText" >
+    <string>pg</string>
+   </property>
    <property name="toolTip" >
     <string>A grid of 36 points that can be triangulated in 1-sheeted covering space</string>
    </property>
@@ -213,6 +299,10 @@
    </property>
   </action>
   <action name="actionSingle_Point" >
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/init1.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/init1.png</iconset>
+   </property>
    <property name="text" >
     <string>Single point</string>
    </property>
@@ -221,6 +311,10 @@
    </property>
   </action>
   <action name="actionRandom_Points_in_Plane" >
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/initRandPlanar.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/initRandPlanar.png</iconset>
+   </property>
    <property name="text" >
     <string>Random planar point set</string>
    </property>
@@ -232,6 +326,10 @@
    </property>
   </action>
   <action name="actionRandom_Point_Set" >
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/initRand.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/initRand.png</iconset>
+   </property>
    <property name="text" >
     <string>Random point set</string>
    </property>
@@ -243,6 +341,10 @@
    </property>
   </action>
   <action name="actionEmpty_scene" >
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/init0.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/init0.png</iconset>
+   </property>
    <property name="text" >
     <string>Empty scene</string>
    </property>
@@ -250,17 +352,6 @@
     <string>F1</string>
    </property>
   </action>
-  <action name="actionShow_flying_ball" >
-   <property name="checkable" >
-    <bool>true</bool>
-   </property>
-   <property name="text" >
-    <string>Show flying ball</string>
-   </property>
-   <property name="shortcut" >
-    <string>B</string>
-   </property>
-  </action>
   <action name="actionDraw_cube_square" >
    <property name="checkable" >
     <bool>true</bool>
@@ -279,6 +370,10 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/locate.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/locate.png</iconset>
+   </property>
    <property name="text" >
     <string>Point location</string>
    </property>
@@ -293,6 +388,10 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/conflict.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/conflict.png</iconset>
+   </property>
    <property name="text" >
     <string>Conflict region</string>
    </property>
@@ -329,6 +428,10 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/ball.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/ball.png</iconset>
+   </property>
    <property name="text" >
     <string>Flying ball</string>
    </property>
@@ -343,6 +446,11 @@
    <property name="checkable" >
     <bool>true</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/pause.png</normaloff>
+     <normalon>:/cgal/Periodic_3_triangulation_3/icons/play.png</normalon>:/cgal/Periodic_3_triangulation_3/icons/pause.png</iconset>
+   </property>
    <property name="text" >
     <string>Pause</string>
    </property>
@@ -418,6 +526,10 @@
    <property name="checkable" >
     <bool>false</bool>
    </property>
+   <property name="icon" >
+    <iconset resource="Periodic_3_triangulation_3.qrc" >
+     <normaloff>:/cgal/Periodic_3_triangulation_3/icons/camera.png</normaloff>:/cgal/Periodic_3_triangulation_3/icons/camera.png</iconset>
+   </property>
    <property name="text" >
     <string>Grab image</string>
    </property>
@@ -449,14 +561,9 @@
     <string>A</string>
    </property>
   </action>
-  <action name="actionHallo" >
+  <action name="actionAbout_CGAL" >
    <property name="text" >
-    <string>Hallo</string>
-   </property>
-  </action>
-  <action name="actionAboutt" >
-   <property name="text" >
-    <string>Aboutt</string>
+    <string>About CGAL</string>
    </property>
   </action>
  </widget>
@@ -468,7 +575,9 @@
    <header>QGLViewer/qglviewer.h</header>
   </customwidget>
  </customwidgets>
- <resources/>
+ <resources>
+  <include location="Periodic_3_triangulation_3.qrc" />
+ </resources>
  <connections>
   <connection>
    <sender>actionClip_along_the_cube_square</sender>
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/ball.png b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/ball.png
new file mode 100644
index 00000000000..78ea86c3acf
Binary files /dev/null and b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/ball.png differ
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/camera.png b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/camera.png
new file mode 100644
index 00000000000..0959e38cb56
Binary files /dev/null and b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/camera.png differ
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clipping.png b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clipping.png
new file mode 100644
index 00000000000..630cf9df5b4
Binary files /dev/null and b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clipping.png differ
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clippingOff.png b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clippingOff.png
new file mode 100644
index 00000000000..3f9031b4164
Binary files /dev/null and b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/clippingOff.png differ
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/conflict.png b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/conflict.png
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diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/license.txt b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/icons/license.txt
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+The following file has been copied from Qt Free Edition version 4.4:
+  fileOpen.png
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diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/CGAL.gif b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/CGAL.gif
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diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about.html b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about.html
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--- /dev/null
+++ b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about.html
@@ -0,0 +1,13 @@
+<html>
+  <body>
+    <h2>CGAL Periodic Delaunay Triangulation</h2>
+    <p>Copyright &copy;2008-2009<br>
+      <a href="http://www-sop.inria.fr/">INRIA Sophia Antipolis - Mediterranee<a/></p>
+    <p>This application illustrates the 3D Periodic Delaunay Triangulation 
+      of <a href="http://www.cgal.org/">CGAL</a>.</p>
+    <p>See also the package manual:<br>
+      <a href="http://www.cgal.org/Pkg/Periodic_3_triangulation_3">
+            3D Periodic Triangulations</a>
+    </p>
+  </body>
+</html>
diff --git a/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about_CGAL.html b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about_CGAL.html
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+++ b/Periodic_3_triangulation_3/demo/Periodic_3_triangulation_3/resources/about_CGAL.html
@@ -0,0 +1,8 @@
+<html>
+  <body>
+    <p><img src=":/cgal/help/CGAL.gif"></p>
+    <h2>Computational Geometry Algorithms Library</h2>
+    <p>CGAL provides efficient and reliable geometric algorithms in the form of a C++ library.</p>
+    <p>For more information visit <a href="http://www.cgal.org/">www.cgal.org</a></p>
+  </body>
+</html>