@article{SEDP_1971-1972____A18_0,
     author = {Grubb, G.},
     title = {Caract\'erisation de quelques propri\'et\'es des probl\`emes aux limites pour les syst\`emes elliptiques},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:19},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1971-1972},
     mrnumber = {397794},
     zbl = {0278.35034},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1971-1972____A18_0/}
}