%0 Journal Article %A Sanjo Zlobec %T Characterizing Optimality in Nonconvex Optimizationi %J Yugoslav journal of operations research %D 1991 %P 3 %V 1 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/YJOR_1991_1_1_a0/ %G en %F YJOR_1991_1_1_a0