@incollection{AST_1991__198-199-200__67_0,
     author = {Bertrand, Anne},
     title = {Nombres de {Perron} et probl\`emes de rationalit\'e},
     booktitle = {Journ\'ees arithm\'etiques de Luminy 17-21 Juillet 1989},
     editor = {Lachaud Gilles},
     series = {Ast\'erisque},
     pages = {67--76},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {198-199-200},
     year = {1991},
     mrnumber = {1144312},
     zbl = {0766.11043},
     language = {fr},
     url = {http://www.numdam.org/item/AST_1991__198-199-200__67_0/}
}