@book{AST_1974__19_,
     author = {Collectif},
     title = {Sur quelques \'equations aux d\'eriv\'ees partielles singuli\`eres},
     series = {Ast\'erisque},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {19},
     year = {1974},
     zbl = {1384.35002},
     language = {mul},
     url = {http://www.numdam.org/item/AST_1974__19_/}
}