@article{DAN_1977_235_4_a9,
     author = {V. A. Korobitsyn and \`E. E. Libin},
     title = {On the exact solution of some difference problems},
     journal = {Doklady Akademii Nauk},
     pages = {764--767},
     publisher = {mathdoc},
     volume = {235},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a9/}
}