@article{ZVMMF_1976_16_5_a26,
     author = {\`E. G. Shifrin and G. V. Shubnikov},
     title = {On an approximation condition of {Neumann} on the boundary in spatial right-angled net with error $O(h^2)$},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1340--1344},
     publisher = {mathdoc},
     volume = {16},
     number = {5},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1976_16_5_a26/}
}