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@article{MZ_1995__220_1_174826, author = {M.S. Baouendi and S. Alinhac}, title = {A non uniqueness result for operators of principle type.}, journal = {Mathematische Zeitschrift}, pages = {561--568}, publisher = {mathdoc}, volume = {220}, number = {1}, year = {1995}, zbl = {0851.35003}, url = {http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174826/} }
M.S. Baouendi; S. Alinhac. A non uniqueness result for operators of principle type.. Mathematische Zeitschrift, Tome 220 (1995) no. 1, pp. 561-568. http://geodesic.mathdoc.fr/item/MZ_1995__220_1_174826/