@book{SB_1977-1978__20_,
     author = {Collectif},
     title = {S\'eminaire {Bourbaki} : vol. 1977/78, expos\'es 507-524},
     series = {S\'eminaire Bourbaki},
     publisher = {Springer-Verlag},
     number = {20},
     year = {1979},
     url = {http://www.numdam.org/item/SB_1977-1978__20_/}
}