@article{SEDP_1970-1971____A30_0, author = {Wilcox, C. H.}, title = {A coerciveness inequality for a class of nonelliptic operators and its applications}, journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"}, note = {talk:30}, pages = {1--10}, publisher = {Ecole Polytechnique, Centre de Math\'ematiques}, year = {1970-1971}, mrnumber = {410053}, zbl = {0235.35014}, language = {en}, url = {http://archive.numdam.org/item/SEDP_1970-1971____A30_0/} }