%0 Journal Article %A Pham-Gia, Thu %T Density of Non Quasi-Analytic Classes of Functions %J Canadian mathematical bulletin %D 1977 %P 467-469 %V 20 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-069-3/ %R 10.4153/CMB-1977-069-3 %F 10_4153_CMB_1977_069_3