diff --git a/Articles_essentiels.bib b/Articles_essentiels.bib
index 218eefa..982ee0c 100644
--- a/Articles_essentiels.bib
+++ b/Articles_essentiels.bib
@@ -16,20 +16,20 @@
 }
 
 ----------------------------------------------------------------------------------------------------------------------------------------------------------------
-@comment A
-@comment B
-@comment C
-@comment D
-@comment E
-@comment F
-@comment G
-@comment H
-@comment I
-@comment J
-@comment K
-@comment L
-@comment M
-@comment N
+@comment {A}
+@comment {B}
+@comment {C}
+@comment {D}
+@comment {E}
+@comment {F}
+@comment {G}
+@comment {H}
+@comment {I}
+@comment {J}
+@comment {K}
+@comment {L}
+@comment {M}
+@comment {N}
 
 @article{Nimmo,
         author = {Ben Nimmo},
@@ -41,15 +41,15 @@
         note = {},
 }
 
-@comment O
-@comment P
-@comment Q
-@comment R
-@comment S
-@comment T
-@comment U
-@comment V
-@comment W
-@comment X
-@comment Y
-@comment Z
+@comment {O}
+@comment {P}
+@comment {Q}
+@comment {R}
+@comment {S}
+@comment {T}
+@comment {U}
+@comment {V}
+@comment {W}
+@comment {X}
+@comment {Y}
+@comment {Z}