%0 Journal Article %A Chien, Tran Quoc %T Nondifferentiable and quasidifferentiable duality in vector optimization theory %J Kybernetika %D 1985 %P 298-312 %V 21 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/KYB_1985__21_4_a5/ %G en %F KYB_1985__21_4_a5