@article{KUIPM_1981_a1,
     author = {A. V. Lapin},
     title = {Approximation of nonlinear stationary variational inequalities},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {9--23},
     publisher = {mathdoc},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1981_a1/}
}