@article{SEDP_1975-1976____A9_0,
     author = {M\'etivier, G.},
     title = {Valeurs propres de syst\`emes elliptiques d\'efinis sur des sous espaces},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:8},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1975-1976},
     mrnumber = {473577},
     zbl = {0336.35042},
     language = {fr},
     url = {http://archive.numdam.org/item/SEDP_1975-1976____A9_0/}
}