@article{SEDP_1976-1977____A11_0, author = {Eskin, G.}, title = {Propagation of singularities for interior mixed hyperbolic problem}, journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"}, note = {talk:12}, pages = {1--21}, publisher = {Ecole Polytechnique, Centre de Math\'ematiques}, year = {1976-1977}, mrnumber = {481566}, zbl = {0361.35042}, language = {en}, url = {http://archive.numdam.org/item/SEDP_1976-1977____A11_0/} }