@article{SEDP_1980-1981____A15_0,
     author = {H\"ormander, L.},
     title = {Th\'eorie de la diffusion \`a courte port\'ee 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:14},
     pages = {1--18},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1980-1981},
     zbl = {0482.35009},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1980-1981____A15_0/}
}