@incollection{SB_1954-1956__3__7_0,
     author = {Berger, Marcel},
     title = {Groupes d'holonomie des vari\'et\'es \`a connexion affine},
     booktitle = {S\'eminaire Bourbaki : ann\'ees 1954/55 - 1955/56, expos\'es 101-136},
     series = {S\'eminaire Bourbaki},
     note = {talk:101},
     pages = {7--12},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {3},
     year = {1956},
     mrnumber = {1611367},
     zbl = {0118.38603},
     language = {fr},
     url = {http://www.numdam.org/item/SB_1954-1956__3__7_0/}
}