@article{SEDP_1977-1978____A13_0,
     author = {Colin de Verdi\`ere, Y.},
     title = {Spectre conjoint d'op\'erateurs diff\'erentiels qui commutent},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:12},
     pages = {1--6},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1977-1978},
     zbl = {0379.35065},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1977-1978____A13_0/}
}