@incollection{SB_1966-1968__10__13_0,
     author = {Hirzebruch, Friedrich},
     title = {Singularities and exotic spheres},
     booktitle = {S\'eminaire Bourbaki : ann\'ees 1966/67 1967/68, expos\'es 313-346},
     series = {S\'eminaire Bourbaki},
     note = {talk:314},
     pages = {13--32},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {10},
     year = {1968},
     mrnumber = {1610436},
     zbl = {0213.47701},
     language = {en},
     url = {http://archive.numdam.org/item/SB_1966-1968__10__13_0/}
}