@article{AIF_1971__21_4_149_0,
     author = {Baouendi, Salah and Goulaouic, Charles},
     title = {Approximation polynomiale de fonctions $C^\infty $ et analytiques},
     journal = {Annales de l'Institut Fourier},
     pages = {149--173},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {21},
     number = {4},
     year = {1971},
     doi = {10.5802/aif.396},
     mrnumber = {50 #5276},
     zbl = {0215.17503},
     language = {fr},
     url = {http://www.numdam.org/articles/10.5802/aif.396/}
}