@article{DE_1976_12_10_a0,
     author = {A. V. Bitsadze and V. A. Il'in and A. A. Samarskii and A. G. Sveshnikov},
     title = {Andre{\v\i} {Nikolaevi{\v{c}}} {Tihonov} (on the occasion of his seventieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1731--1735},
     publisher = {mathdoc},
     volume = {12},
     number = {10},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_10_a0/}
}