%0 Journal Article %A Massey, David B. %A Siersma, Dirk %T Deformation of polar methods %J Annales de l'Institut Fourier %D 1992 %P 737-778 %V 42 %N 4 %I Institut Fourier %C Grenoble %U http://archive.numdam.org/articles/10.5802/aif.1308/ %R 10.5802/aif.1308 %G en %F AIF_1992__42_4_737_0