@article{SEDP_1979-1980____A4_0,
     author = {Alinhac, S.},
     title = {Non-unicit\'e pour des op\'erateurs \`a caract\'eristiques simples},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:4},
     pages = {1--6},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1979-1980},
     mrnumber = {600688},
     zbl = {0473.35004},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1979-1980____A4_0/}
}