@incollection{AST_1990__183__19_0,
     author = {Masser, D. W.},
     title = {Note on a conjecture of {Szpiro}},
     booktitle = {S\'eminaire sur les pinceaux de courbes elliptiques (\`a la recherche de {\guillemotleft}Mordell effectif{\guillemotright})},
     editor = {Spziro Lucien},
     series = {Ast\'erisque},
     pages = {19--23},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {183},
     year = {1990},
     mrnumber = {1065152},
     zbl = {0742.14027},
     language = {en},
     url = {http://www.numdam.org/item/AST_1990__183__19_0/}
}