@incollection{AST_1985__127__151_0,
     author = {Illusie, Luc},
     title = {D\'eformations de groupes de {Barsotti-Tate}},
     booktitle = {S\'eminaire sur les pinceaux arithm\'etiques : la conjecture de Mordell},
     series = {Ast\'erisque},
     pages = {151--198},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {127},
     year = {1985},
     mrnumber = {801922},
     zbl = {1182.14050},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1985__127__151_0/}
}