@article{SEDP_1981-1982____A3_0,
     author = {Lascar, R. and Zuily, C.},
     title = {Unicit\'e et non unicit\'e du probl\`eme de {Cauchy} pour une classe d'op\'erateurs diff\'erentiels \`a caract\'eristiques doubles},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:3},
     pages = {1--10},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1981-1982},
     zbl = {0496.35003},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1981-1982____A3_0/}
}