revert the revert ca0e29ac

Thx Jerome

doc/citing_yade.bib

 @book{yade:doc2,
 	altnote = "\\url{http://yade-dem.org/doc/}",
-	author = "V. \v{S}milauer et al.",
+	author = "V. \v{S}milauer and others",
 	doi = "10.5281/zenodo.34073",
 	note = "http://yade-dem.org/doc/",
 	title = "{{Y}ade {D}ocumentation 2nd ed}",
@@ -10,7 +10,7 @@
 
 @incollection{yade:manual2,
 	altnote = "\\url{http://yade-dem.org/doc/}",
-	author = "V. \v{S}milauer et al.",
+	author = "V. \v{S}milauer and others",
 	doi = "10.5281/zenodo.34043",
 	booktitle = "{Y}ade {D}ocumentation 2nd ed",
 	note = "http://yade-dem.org/doc/",
@@ -21,7 +21,7 @@
 
 @incollection{yade:background2,
 	altnote = "\\url{http://yade-dem.org/doc/}",
-	author = "V. \v{S}milauer et al.",
+	author = "V. \v{S}milauer and others",
 	doi = "10.5281/zenodo.34044",
 	booktitle = "{Y}ade {D}ocumentation 2nd ed",
 	note = "http://yade-dem.org/doc/",
@@ -32,7 +32,7 @@
 
 @incollection{yade:reference2,
 	altnote = "\\url{http://yade-dem.org/doc/}",
-	author = "V. \v{S}milauer et al.",
+	author = "V. \v{S}milauer and others",
 	doi = "10.5281/zenodo.34045",
 	booktitle = "{Y}ade {D}ocumentation 2nd ed",
 	note = "http://yade-dem.org/doc/",