@article{ZVMMF_1961_1_5_a4,
     author = {A. N. Tikhonov and A. A. Samarskii},
     title = {The {Sturm{\textendash}Liouville} difference problem},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {784--805},
     publisher = {mathdoc},
     volume = {1},
     number = {5},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1961_1_5_a4/}
}