diff --git a/Documentation/Doxyfile.in b/Documentation/Doxyfile.in
index c0bf72cf2393804e78933418e9630eb97691c6f8..014864e614694ee7ddb8e26aeff38eb29f733032 100644
--- a/Documentation/Doxyfile.in
+++ b/Documentation/Doxyfile.in
@@ -692,7 +692,7 @@ LAYOUT_FILE            = ${CMAKE_SOURCE_DIR}/Documentation/DoxygenLayout.xml
 # LATEX_BIB_STYLE. To use this feature you need bibtex and perl available in the
 # search path. See also \cite for info how to create references.
 
-CITE_BIB_FILES         =
+CITE_BIB_FILES         = ${PROJECT_SOURCE_DIR}/Documentation/bibliography
 
 #---------------------------------------------------------------------------
 # Configuration options related to warning and progress messages
diff --git a/Documentation/bibliography.bib b/Documentation/bibliography.bib
new file mode 100644
index 0000000000000000000000000000000000000000..04937bd17cafe59709369cb090be8951688419d3
--- /dev/null
+++ b/Documentation/bibliography.bib
@@ -0,0 +1,8 @@
+@book{Ericson:2004:RCD:1121584,
+ author = {Ericson, Christer},
+ title = {Real-Time Collision Detection (The Morgan Kaufmann Series in Interactive 3-D Technology) (The Morgan Kaufmann Series in Interactive 3D Technology)},
+ year = {2004},
+ isbn = {1558607323},
+ publisher = {Morgan Kaufmann Publishers Inc.},
+ address = {San Francisco, CA, USA},
+}
\ No newline at end of file
diff --git a/GeoLib/AnalyticalGeometry.h b/GeoLib/AnalyticalGeometry.h
index aea8be332bbd01a25bf2c57af53b642a34db1210..e07a73b4609a326ac711f3add921e24823d5ef34 100644
--- a/GeoLib/AnalyticalGeometry.h
+++ b/GeoLib/AnalyticalGeometry.h
@@ -55,7 +55,8 @@ Orientation getOrientation (const GeoLib::Point* p0,
 /**
  * compute a supporting plane (represented by plane_normal and the value d) for the polygon
  * Let \f$n\f$ be the plane normal and \f$d\f$ a parameter. Then for all points \f$p \in R^3\f$ of the plane
- * it holds \f$ n \cdot p + d = 0\f$
+ * it holds \f$ n \cdot p + d = 0\f$. The Newell algorithm is described in
+ * \cite Ericson:2004:RCD:1121584 .
  * @param pnts points of a closed polyline describing a polygon
  * @param plane_normal the normal of the plane the polygon is located in
  * @param d parameter from the plane equation