@incollection{AST_1975__24-25__15_0,
     author = {Cougnard, Jean},
     title = {Sur l'anneau des entiers des $p$-extensions},
     booktitle = {Journ\'ees arithm\'etiques de Bordeaux},
     series = {Ast\'erisque},
     pages = {15--20},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {24-25},
     year = {1975},
     zbl = {0309.12003},
     mrnumber = {392921},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1975__24-25__15_0/}
}