@article{ZVMMF_1964_4_2_a3,
     author = {V. S. Ryaben'kii},
     title = {Necessary and sufficient conditions for good definition of boundary value problems for systems of ordinary difference equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {242--255},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1964_4_2_a3/}
}