%0 Journal Article %A G. Colombo %A V. V. Goncharov %T Variational Inequalities and Regularity Properties of Closed Sets in Hilbert Spaces %J Journal of convex analysis %D 2001 %P 197-222 %V 8 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JCA_2001_8_1_JCA_2001_8_1_a8/ %F JCA_2001_8_1_JCA_2001_8_1_a8