@article{DAN_1980_255_5_a0,
     author = {W. Weinelt},
     title = {On difference approximation of variational inequalities},
     journal = {Doklady Akademii Nauk},
     pages = {1033--1035},
     publisher = {mathdoc},
     volume = {255},
     number = {5},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1980_255_5_a0/}
}