@incollection{SB_1990-1991__33__269_0,
     author = {Pansu, Pierre},
     title = {Le flot g\'eod\'esique des vari\'et\'es riemanniennes \`a courbure n\'egative},
     booktitle = {S\'eminaire Bourbaki : volume 1990/91, expos\'es 730-744},
     series = {Ast\'erisque},
     note = {talk:738},
     pages = {269--298},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {201-202-203},
     year = {1991},
     mrnumber = {1157845},
     zbl = {0753.58024},
     language = {fr},
     url = {http://archive.numdam.org/item/SB_1990-1991__33__269_0/}
}