@article{ZVMMF_1964_4_4_a16,
     author = {S. V. Nemchinov and S. L. Libov},
     title = {A more accurate direct method for the solution of boundary problems for the {Helmholtz} equation on a net of points in a rectangle},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {771--773},
     year = {1964},
     volume = {4},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_4_a16/}
}