%0 Journal Article %A Roubíček, Tomáš %T Evaluation of Clarke's generalized gradient in optimization of variational inequalities %J Kybernetika %D 1989 %P 157-168 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1989__25_3_a1/ %G en %F KYB_1989__25_3_a1