@incollection{SB_2000-2001__43__85_0,
     author = {Herzlich, Marc},
     title = {L'in\'egalit\'e de {Penrose}},
     booktitle = {S\'eminaire Bourbaki : volume 2000/2001, expos\'es 880-893},
     series = {Ast\'erisque},
     note = {talk:883},
     pages = {85--111},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {282},
     year = {2002},
     mrnumber = {1975176},
     zbl = {1042.53022},
     language = {fr},
     url = {http://archive.numdam.org/item/SB_2000-2001__43__85_0/}
}