@article{SEDP_1980-1981____A23_0,
     author = {Treves, F.},
     title = {Sur la r\'esolubilit\'e locale et l'int\'egrabilit\'e locale de syst\`emes de champs vectoriels},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:21},
     pages = {1--11},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1980-1981},
     zbl = {0478.35023},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1980-1981____A23_0/}
}