@article{KUIPM_1973_a12,
     author = {A. V. Lapin},
     title = {Convergence of difference schemes for boundary problems in an arbitrary domain},
     journal = {Issledovaniya po Prikladnoi Matematike i Informatike},
     pages = {90--93},
     publisher = {mathdoc},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUIPM_1973_a12/}
}