@book{AST_1981__89-90_, author = {Collectif}, title = {Analytic solutions of partial differential equations - {Trento,} 1981}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {89-90}, year = {1981}, zbl = {0518.35007}, language = {mul}, url = {http://archive.numdam.org/item/AST_1981__89-90_/} }