@incollection{AST_1977__41-42__173_0,
     author = {Bertrand, Daniel},
     title = {Sur les d\'enominateurs des points rationnels des courbes elliptiques},
     booktitle = {Journ\'ees arithm\'etiques de Caen},
     series = {Ast\'erisque},
     pages = {173--178},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {41-42},
     year = {1977},
     zbl = {0348.14013},
     mrnumber = {444580},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1977__41-42__173_0/}
}