@book{SB_1978-1979__21_,
     author = {Collectif},
     title = {S\'eminaire {Bourbaki} : vol. 1978/79, expos\'es 525-542},
     series = {S\'eminaire Bourbaki},
     publisher = {Springer-Verlag},
     number = {21},
     year = {1980},
     url = {http://www.numdam.org/item/SB_1978-1979__21_/}
}