%0 Journal Article %A Leonid D. Popov %T On Bilevel Variational Inequalities Arising in the Analysis of Improper Optimization Problems %J Yugoslav journal of operations research %D 2001 %P 3 %V 11 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/YJOR_2001_11_1_a0/ %G en %F YJOR_2001_11_1_a0