diff -r df2d4bf31fcb -r 9b4503108cc0 doc/references.bib
--- a/doc/references.bib	Tue Sep 22 18:20:15 2015 +0200
+++ b/doc/references.bib	Wed Oct 07 18:49:46 2015 +0200
@@ -356,15 +356,14 @@
 }
 
 @article{cordella2004sub,
-  title =	 {A (sub) graph isomorphism algorithm for matching
+  author =       {Cordella, Luigi P. and Foggia, Pasquale and Sansone,
+                  Carlo and Vento, Mario},
+  title =        {A (sub)graph isomorphism algorithm for matching
                   large graphs},
-  author =	 {Cordella, Luigi P and Foggia, Pasquale and Sansone,
-                  Carlo and Vento, Mario},
-  journal =	 {Pattern Analysis and Machine Intelligence, IEEE
-                  Transactions on},
-  volume =	 26,
-  number =	 10,
-  pages =	 {1367--1372},
-  year =	 2004,
-  publisher =	 {IEEE}
+  journal =      {IEEE Transactions on Pattern Analysis and Machine
+                  Intelligence},
+  volume =       26,
+  number =       10,
+  pages =        {1367--1372},
+  year =         2004
 }