@article{ZVMMF_1988_28_8_a4,
     author = {A. Zemla},
     title = {Lattice approximations of the {Helmholtz} equation in a singularly perturbed region},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1177--1189},
     publisher = {mathdoc},
     volume = {28},
     number = {8},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1988_28_8_a4/}
}