@article{DE_1969_5_10_a20,
     author = {A. N. Tikhonov and V. A. Il'in and A. G. Sveshnikov and A. A. Arsen'ev},
     title = {Aleksandr {Andreevi{\v{c}}} {Samarski{\v\i}} on his fiftieth birthday},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1909--1914},
     publisher = {mathdoc},
     volume = {5},
     number = {10},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_10_a20/}
}