@article{JEDP_1977____59_0,
     author = {Croc, \'Elisabeth and Dermenjian, Yves and Iftimie, Viorel},
     title = {Une classe d'op\'erateurs pseudo-diff\'erentiels partiellement hypoelliptique-analytiques},
     journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     pages = {59--65},
     publisher = {Ecole polytechnique},
     year = {1977},
     language = {fr},
     url = {http://archive.numdam.org/item/JEDP_1977____59_0/}
}