@incollection{AST_1980__75-76__87_0,
    author = {Ferfera, Abdelhak},
    title = {Combinatoire du mono{\"\i}de libre et composition de certains syst\`emes non lin\'eaires},
    booktitle = {Analyse des syst\`emes},
    series = {Ast\'erisque},
    pages = {87--93},
    publisher = {Soci\'et\'e math\'ematique de France},
    number = {75-76},
    year = {1980},
    mrnumber = {581705},
    zbl = {0458.93028},
    language = {fr},
    url = {http://www.numdam.org/item/AST_1980__75-76__87_0/},
    date-added = {2024-10-11 10:56:27 +0100}
}

@incollection{AST_1980__75-76__87_0, author = {Ferfera, Abdelhak}, title = {Combinatoire du mono{\"\i}de libre et composition de certains syst`emes non lin\'eaires}, booktitle = {Analyse des syst`emes}, series = {Ast\'erisque}, pages = {87--93}, publisher = {Soci\'et\'e math\'ematique de France}, number = {75-76}, year = {1980}, mrnumber = {581705}, zbl = {0458.93028}, language = {fr}, url = {http://www.numdam.org/item/AST_1980__75-76__87_0/}, date-added = {2024-10-11 10:56:27 +0100} }