diff --git a/doc/gf-bibliography.t2t b/doc/gf-bibliography.t2t
index d63fa81d1..76324bdf9 100644
--- a/doc/gf-bibliography.t2t
+++ b/doc/gf-bibliography.t2t
@@ -146,7 +146,7 @@ ACM Digital Library,
 2010.
 [PDF http://www.aclweb.org/anthology-new/P/P10/P10-4012.pdf]
 #BR
-//An overview of of GF for developers and users of translation systems.//
+//An overview of GF for developers and users of translation systems.//
 
 D. Dannélls and J. Camilleri. 
 Verb Morphology of Hebrew and Maltese - Towards an Open Source Type Theoretical Resource Grammar in GF.