@incollection{JEDP_1980____A18_0, author = {Grigis, Alain}, title = {Propagation des singularit\'es sur des groupes de {Lie} nilpotents}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {18}, pages = {1--3}, publisher = {Ecole polytechnique}, year = {1980}, zbl = {0501.22013}, language = {fr}, url = {http://archive.numdam.org/item/JEDP_1980____A18_0/} }