%0 Journal Article
%A Broglia, F.
%A Tognoli, A.
%T Approximation of $C^\infty $-functions without changing their zero-set
%J Annales de l'Institut Fourier
%D 1989
%P 611-632
%V 39
%N 3
%I Institut Fourier
%C Grenoble
%U http://www.numdam.org/articles/10.5802/aif.1178/
%R 10.5802/aif.1178
%G en
%F AIF_1989__39_3_611_0