A Class of Hypoelliptic Pseudodifferential Operators with Double Characteristics.
Hörmander, Lars
Mathematische Annalen, Tome 217 (1975), p. 165-188 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1975-01-01
EUDML-ID : urn:eudml:doc:162768 
@article{GDZPPN002311755,
     title = {A Class of Hypoelliptic Pseudodifferential Operators with Double Characteristics.},
     journal = {Mathematische Annalen},
     volume = {217},
     year = {1975},
     pages = {165-188},
     zbl = {0306.35032},
     url = {http://dml.mathdoc.fr/item/GDZPPN002311755}
}

Hörmander, Lars. A Class of Hypoelliptic Pseudodifferential Operators with Double Characteristics.. Mathematische Annalen, Tome 217 (1975) pp. 165-188. http://gdmltest.u-ga.fr/item/GDZPPN002311755/