@article{VTAMU_2021_26_135_a1,
     author = {Z. T. Zhukovskaya and T. V. Zhukovskaya and O. V. Filippova},
     title = {Eckland and {Bishop-Phelps} variational principles in partially ordered spaces},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {234--240},
     publisher = {mathdoc},
     volume = {26},
     number = {135},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2021_26_135_a1/}
}