diff --git a/Manual/doc_tex/Manual/manual-3.10.bib b/Manual/doc_tex/Manual/manual-3.10.bib
index 16c462f490e..9be2c72df71 100644
--- a/Manual/doc_tex/Manual/manual-3.10.bib
+++ b/Manual/doc_tex/Manual/manual-3.10.bib
@@ -717,7 +717,7 @@
 , year =        2012
 }
 
-@incollection{cgal:d-ss-12
+@incollection{cgal:dd-ss-12
 , author =  "Christophe Delage and Olivier Devillers"
 , title =   "Spatial Sorting"
 , publisher =  "{CGAL Editorial Board}"
@@ -767,7 +767,7 @@
 , year =        2012
 }
 
-@incollection{cgal:hhk-gog-12
+@incollection{cgal:dhhk-gog-12
 , author =  "Olivier Devillers and Susan Hert and Michael Hoffmann and Lutz Kettner and Sven Sch\"onherr"
 , title =   "Geometric Object Generators"
 , publisher =  "{CGAL Editorial Board}"
diff --git a/Manual/doc_tex/Manual/manual-3.8.bib b/Manual/doc_tex/Manual/manual-3.8.bib
index 24307e847f1..fe44ccc5b87 100644
--- a/Manual/doc_tex/Manual/manual-3.8.bib
+++ b/Manual/doc_tex/Manual/manual-3.8.bib
@@ -757,7 +757,7 @@
 , year =        2011
 }
 
-@incollection{cgal:hhk-gog-11
+@incollection{cgal:dhhk-gog-11
 , author =  "Olivier Devillers and Susan Hert and Michael Hoffmann and Lutz Kettner and Sven Sch\"onherr"
 , title =   "Geometric Object Generators"
 , publisher =  "{CGAL Editorial Board}"
diff --git a/Manual/doc_tex/Manual/manual-3.9.bib b/Manual/doc_tex/Manual/manual-3.9.bib
index 0d7c351bc1d..01344dbe04d 100644
--- a/Manual/doc_tex/Manual/manual-3.9.bib
+++ b/Manual/doc_tex/Manual/manual-3.9.bib
@@ -717,7 +717,7 @@
 , year =        2011
 }
 
-@incollection{cgal:d-ss-11b
+@incollection{cgal:dd-ss-11b
 , author =  "Christophe Delage and Olivier Devillers"
 , title =   "Spatial Sorting"
 , publisher =  "{CGAL Editorial Board}"
@@ -767,7 +767,7 @@
 , year =        2011
 }
 
-@incollection{cgal:hhk-gog-11b
+@incollection{cgal:dhhk-gog-11b
 , author =  "Olivier Devillers and Susan Hert and Michael Hoffmann and Lutz Kettner and Sven Sch\"onherr"
 , title =   "Geometric Object Generators"
 , publisher =  "{CGAL Editorial Board}"