diff --git a/content/booklets/adacore-technologies-for-railway-software/references.bib b/content/booklets/adacore-technologies-for-railway-software/references.bib
index 1fbb9faa..1e6f35d7 100644
--- a/content/booklets/adacore-technologies-for-railway-software/references.bib
+++ b/content/booklets/adacore-technologies-for-railway-software/references.bib
@@ -1,5 +1,3 @@
-.. Bibliography
-
 @manual{AdaCore_2016,
   organization = {AdaCore},
   title  = {{High-Integrity Object-Oriented Programming in Ada, Version 1.4}},