# HG changeset patch
# User Alpar Juttner <alpar@cs.elte.hu>
# Date 1539809702 -7200
# Node ID 73e29215aaa434a3ffb638710b0c873101d5a600
# Parent  e68f0ef37e77b716871c4f7917d8879a3fe45846
Add citation for Vf2pp (#597)

diff -r e68f0ef37e77 -r 73e29215aaa4 doc/references.bib
--- a/doc/references.bib	Sat Oct 07 17:03:30 2017 +0200
+++ b/doc/references.bib	Wed Oct 17 22:55:02 2018 +0200
@@ -43,6 +43,17 @@
   pages =        {67--118}
 }
 
+@article{VF2PP,
+  author =       {Alp\'ar J\"uttner and  P\'eter Madarasi},
+  title =        {{VF2++} — An improved subgraph isomorphism algorithm},
+  journal =      {Discrete Applied Mathematics},
+  year =         {2018},
+  volume =       {242},
+  pages =        {69--81},
+  url =          {https://doi.org/10.1016/j.dam.2018.02.018}
+}
+
+
 
 %%%%% Other libraries %%%%%%
 
diff -r e68f0ef37e77 -r 73e29215aaa4 lemon/vf2pp.h
--- a/lemon/vf2pp.h	Sat Oct 07 17:03:30 2017 +0200
+++ b/lemon/vf2pp.h	Wed Oct 17 22:55:02 2018 +0200
@@ -32,10 +32,10 @@
 
 namespace lemon {
 
-  ///%VF2 Plus Plus algorithm class.
+  ///%VF2 Plus Plus algorithm class \cite VF2PP.
 
   ///\ingroup graph_isomorphism This class provides an efficient
-  ///implementation of the %VF2 Plus Plus algorithm
+  ///implementation of the %VF2 Plus Plus algorithm \cite VF2PP
   ///for variants of the (Sub)graph Isomorphism problem.
   ///
   ///There is also a \ref vf2pp() "function-type interface" called