@incollection{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},
     booktitle = {},
     series = {Journ\'ees \'equations aux d\'eriv\'ees partielles},
     pages = {59--65},
     year = {1977},
     publisher = {Ecole polytechnique},
     doi = {10.5802/jedp.156},
     language = {fr},
     url = {https://www.numdam.org/articles/10.5802/jedp.156/}
}