@article{SJL_1962-1963____190_0,
     author = {Malgrange, Bernard},
     title = {Quelques probl\`emes de convexit\'e pour les op\'erateurs diff\'erentiels \`a coefficients constants},
     journal = {S\'eminaire sur les \'equations aux d\'eriv\'ees partielles},
     pages = {190--223},
     year = {1962-1963},
     publisher = {Coll\`ege de France},
     language = {fr},
     url = {https://www.numdam.org/item/SJL_1962-1963____190_0/}
}