@article{SEDP_1987-1988____A13_0, author = {Dencker, N.}, title = {The propagation of singularities for pseudo-differential operators with self-tangential characteristics}, journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"}, note = {talk:13}, publisher = {Ecole Polytechnique, Centre de Math\'ematiques}, year = {1987-1988}, zbl = {0682.35110}, mrnumber = {1018185}, language = {en}, url = {http://archive.numdam.org/item/SEDP_1987-1988____A13_0/} }