@incollection{AST_1979__61__169_0,
     author = {Oriat, Bernard},
     title = {G\'en\'eralisation du {"Spiegelungssatz"}},
     booktitle = {Journ\'ees Arithm\'etiques de Luminy},
     series = {Ast\'erisque},
     pages = {169--175},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {61},
     year = {1979},
     zbl = {0403.12014},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1979__61__169_0/}
}