@incollection{AST_1977__41-42__215_0,
     author = {Gay, David A.},
     title = {Normal extensions defined by a binomial equation},
     booktitle = {Journ\'ees arithm\'etiques de Caen},
     series = {Ast\'erisque},
     pages = {215--218},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {41-42},
     year = {1977},
     mrnumber = {498509},
     zbl = {0356.12001},
     language = {en},
     url = {http://archive.numdam.org/item/AST_1977__41-42__215_0/}
}