diff --git a/Number_types/doc/Number_types/CGAL/boost_mp.h b/Number_types/doc/Number_types/CGAL/boost_mp.h
new file mode 100644
index 00000000000..a9625d3fc62
--- /dev/null
+++ b/Number_types/doc/Number_types/CGAL/boost_mp.h
@@ -0,0 +1,78 @@
+
+namespace boost { namespace multiprecision {
+
+/*!
+\ingroup nt_boost
+
+The class `cpp_rational` is an exact multiprecision rational number type,
+provided by \boost.
+This header provides the necessary functions to make it compliant to the number type
+concept.
+
+\cgalModels{Field,RealEmbeddable,Fraction}
+
+See the \boost documentation for additional details on
+<a href="https://www.boost.org/doc/libs/latest/libs/multiprecision/doc/html/boost_multiprecision/tut/rational.html">Boost Multiprecision Rational Types</a>
+
+*/
+
+class cpp_rational {
+};
+
+
+/*!
+\ingroup nt_boost
+
+The class `gmp_rational` is an exact multiprecision rational number type,
+provided by \boost.
+This header provides the necessary functions to make it compliant to the number type
+concept.
+
+\cgalModels{Field,RealEmbeddable,Fraction}
+
+See the \boost documentation for additional details on
+<a href="https://www.boost.org/doc/libs/latest/libs/multiprecision/doc/html/boost_multiprecision/tut/rational.html">Boost Multiprecision Rational Types</a>
+
+*/
+
+class gmp_rational {
+};
+
+
+/*!
+\ingroup nt_boost
+
+The class `cpp_int` is an exact multiprecision integer number type,
+provided by \boost.
+This header provides the necessary functions to make it compliant to the number type
+concept.
+
+\cgalModels{EuclideanRing,RealEmbeddable}
+
+See the \boost documentation for additional details on
+<a href="https://www.boost.org/doc/libs/latest/libs/multiprecision/doc/html/boost_multiprecision/tut/ints.html">Boost Multiprecision Integer Types</a>
+
+*/
+
+class cpp_int {
+};
+
+/*!
+\ingroup nt_boost
+
+The class `gmp_int` is an exact multiprecision integer number type,
+provided by \boost.
+This header provides the necessary functions to make it compliant to the number type
+concept.
+
+\cgalModels{EuclideanRing,RealEmbeddable}
+
+See the \boost documentation for additional details on
+<a href="https://www.boost.org/doc/libs/latest/libs/multiprecision/doc/html/boost_multiprecision/tut/ints.html">Boost Multiprecision Integer Types</a>
+
+*/
+
+class gmp_int {
+};
+
+}} //namespace boost::multiprecision
diff --git a/Number_types/doc/Number_types/CGAL/gmpxx.h b/Number_types/doc/Number_types/CGAL/gmpxx.h
index b6c19f42328..f4899a9421b 100644
--- a/Number_types/doc/Number_types/CGAL/gmpxx.h
+++ b/Number_types/doc/Number_types/CGAL/gmpxx.h
@@ -6,7 +6,7 @@
 
 The class `mpq_class` is an exact multiprecision rational number type,
 provided by \gmp.
-CGAL provides the necessary functions to make it compliant to the number type
+This header provides the necessary functions to make it compliant to the number type
 concept.
 
 \cgalModels{Field,RealEmbeddable,Fraction}
@@ -26,7 +26,7 @@ class mpq_class {
 
 The class `mpz_class` is an exact multiprecision integer number type,
 provided by \gmp.
-CGAL provides the necessary functions to make it compliant to the number type
+This header provides the necessary functions to make it compliant to the number type
 concept.
 
 \cgalModels{EuclideanRing,RealEmbeddable}