@article{AIF_1959__9__1_0,
     author = {Tr\`eves, Fran\c{c}ois},
     title = {Op\'erateurs diff\'erentiels hypoelliptiques},
     journal = {Annales de l'Institut Fourier},
     pages = {1--73},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {9},
     year = {1959},
     doi = {10.5802/aif.85},
     mrnumber = {22 #4886},
     zbl = {0197.36602},
     language = {fr},
     url = {http://www.numdam.org/articles/10.5802/aif.85/}
}