@article{SEDP_1974-1975____A6_0,
     author = {Baouendi, M. S. and Sj\"ostrand, J.},
     title = {R\'egularit\'e analytique pour des op\'erateurs elliptiques singuliers en un point},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:7},
     pages = {1--10},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1974-1975},
     mrnumber = {601602},
     zbl = {0308.35037},
     language = {fr},
     url = {http://www.numdam.org/item/SEDP_1974-1975____A6_0/}
}