@incollection{JEDP_1978____A14_0, author = {Grubb, Gerd}, title = {Sur la th\'eorie spectrale des probl\`emes aux limites pseudo-diff\'erentiels elliptiques}, booktitle = {}, series = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {14}, pages = {1--2}, publisher = {Ecole polytechnique}, year = {1978}, language = {fr}, url = {http://archive.numdam.org/item/JEDP_1978____A14_0/} }