diff --git a/biblio.bib b/biblio.bib
index b95aa84..2ae127d 100644
--- a/biblio.bib
+++ b/biblio.bib
@@ -1668,22 +1668,22 @@
 }
 
 @inproceedings{DBLP:conf/hase/Petrenko0GHO14,
-  author    = {Alexandre Petrenko and
-               Keqin Li and
-               Roland Groz and
-               Karim Hossen and
-               Catherine Oriat},
-  title     = {Inferring Approximated Models for Systems Engineering},
-  booktitle = {15th International {IEEE} Symposium on High-Assurance Systems Engineering,
-               {HASE} 2014, Miami Beach, FL, USA, January 9-11, 2014},
-  pages     = {249--253},
-  publisher = {{IEEE} Computer Society},
-  year      = {2014},
-  url       = {https://doi.org/10.1109/HASE.2014.46},
-  doi       = {10.1109/HASE.2014.46},
-  timestamp = {Thu, 25 May 2017 00:41:35 +0200},
-  biburl    = {https://dblp.org/rec/bib/conf/hase/Petrenko0GHO14},
-  bibsource = {dblp computer science bibliography, https://dblp.org}
+	author    = {Alexandre Petrenko and
+	             Keqin Li and
+	             Roland Groz and
+	             Karim Hossen and
+	             Catherine Oriat},
+	title     = {Inferring Approximated Models for Systems Engineering},
+	booktitle = {15th International {IEEE} Symposium on High-Assurance Systems Engineering,
+	             {HASE} 2014, Miami Beach, FL, USA, January 9-11, 2014},
+	pages     = {249--253},
+	publisher = {{IEEE} Computer Society},
+	year      = {2014},
+	url       = {https://doi.org/10.1109/HASE.2014.46},
+	doi       = {10.1109/HASE.2014.46},
+	timestamp = {Thu, 25 May 2017 00:41:35 +0200},
+	biburl    = {https://dblp.org/rec/bib/conf/hase/Petrenko0GHO14},
+	bibsource = {dblp computer science bibliography, https://dblp.org}
 }
 
 @inproceedings{PetrenkoY14,