@article{SEDP_1974-1975____A14_0,
     author = {Morawetz, C. S.},
     title = {Nouveaux probl\`emes sur les \'equations mixtes},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:15},
     pages = {1--10},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1974-1975},
     mrnumber = {397189},
     zbl = {0307.35066},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1974-1975____A14_0/}
}