@article{BSMF_1956__84__9_0, author = {Lions, Jacques-Louis}, title = {Op\'erateurs de {Delsarte} et probl\`emes mixtes}, journal = {Bulletin de la Soci\'et\'e Math\'ematique de France}, pages = {9--95}, publisher = {Soci\'et\'e math\'ematique de France}, volume = {84}, year = {1956}, doi = {10.24033/bsmf.1467}, mrnumber = {19,556c}, zbl = {0075.10804}, language = {fr}, url = {http://www.numdam.org/articles/10.24033/bsmf.1467/} }