diff --git a/intro-etatdeslieux.md b/intro-etatdeslieux.md
index ccd6ff5..9c6c2aa 100644
--- a/intro-etatdeslieux.md
+++ b/intro-etatdeslieux.md
@@ -74,7 +74,8 @@ include-before: |
   
   \par\noindent\rule{1.5cm}{1.5pt}
   \vfill
-  
+  DOI : 10.52949/34
+  \vfill
   \normalsize
   Conception graphique : opixido