%0 Journal Article %A Z. T. Zhukovskaya %A T. V. Zhukovskaya %A O. V. Filippova %T Eckland and Bishop-Phelps variational principles in partially ordered spaces %J Vestnik rossijskih universitetov. Matematika %D 2021 %P 234-240 %V 26 %N 135 %U http://geodesic.mathdoc.fr/item/VTAMU_2021_26_135_a1/ %G ru %F VTAMU_2021_26_135_a1