@article{SEDP_1977-1978____A6_0,
     author = {Robert, D.},
     title = {Propri\'et\'es spectrales d'op\'erateurs pseudodiff\'erentiels},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:5},
     pages = {1--10},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1977-1978},
     zbl = {0379.35063},
     language = {fr},
     url = {http://archive.numdam.org/item/SEDP_1977-1978____A6_0/}
}