@article{MM_1997_9_11_a8,
     author = {M. N. Mishkov and V. S. Ryaben'kii},
     title = {On replacing an outer boundary problem with associated periodic problem},
     journal = {Matemati\v{c}eskoe modelirovanie},
     pages = {101--110},
     publisher = {mathdoc},
     volume = {9},
     number = {11},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MM_1997_9_11_a8/}
}