Vim substitution

Just a note to remember substitution :

:%s/\ {http\(.*\)},/\ {\\url{http\1}},/

Goal was, in a bibtex file, to make an anchor with each url, using \url{} command.

For example, 

 @MISC{ademe,
  title = {http://www.ademe.fr},
  note = {L'Agence de l'environnement et de la ma\^itrise de l'\'energie},
}

became

 @MISC{ademe,
  title = {\url{http://www.ademe.fr}},
  note = {L'Agence de l'environnement et de la ma\^itrise de l'\'energie},
}{jcomments on}