@book{AST_1992__207_,
     author = {Collectif},
     title = {M\'ethodes semi-classiques {Volume} 1 - {\'Ecole} {d'\'Et\'e} {(Nantes,} juin 1991)},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {207},
     year = {1992},
     language = {mul},
     url = {http://www.numdam.org/item/AST_1992__207_/}
}