@book{AST_1978__59-60_, author = {Collectif}, title = {Journ\'ees singuli\`eres de {Dijon}}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {59-60}, year = {1978}, language = {mul}, url = {http://archive.numdam.org/item/AST_1978__59-60_/} }