@article{AIF_1971__21_4_99_0, author = {Derridj, Makhlouf}, title = {Un probl\`eme aux limites pour une classe d'op\'erateurs du second ordre hypoelliptiques}, journal = {Annales de l'Institut Fourier}, pages = {99--148}, publisher = {Institut Fourier}, address = {Grenoble}, volume = {21}, number = {4}, year = {1971}, doi = {10.5802/aif.395}, zbl = {0215.45405}, mrnumber = {58 #29139}, language = {fr}, url = {https://aif.centre-mersenne.org/articles/10.5802/aif.395/} }