@article{JEDP_1974____A4_0, author = {Baouendi, Mohamed Salah and Sj\"ostrand, Johannes}, title = {R\'egularit\'e analytique pour des op\'erateurs elliptiques singuliers en un point}, journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, eid = {4}, pages = {1--7}, publisher = {Ecole polytechnique}, year = {1974}, language = {fr}, url = {http://archive.numdam.org/item/JEDP_1974____A4_0/} }