@incollection{MSMF_1972__31-32__187_0,
     author = {Goulaouic, Charles},
     title = {Approximation polynomiale des fonctions $C^\infty $ et analytiques},
     booktitle = {Colloque d'analyse fonctionnelle (Bordeaux, 1971)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {187--190},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {31-32},
     year = {1972},
     doi = {10.24033/msmf.82},
     mrnumber = {50 #8051},
     zbl = {0255.41005},
     url = {http://archive.numdam.org/articles/10.24033/msmf.82/}
}