@article{DE_1986_22_12_a1,
     author = {A. A. Dorodnitsyn and N. P. Erugin and V. A. Il'in and A. A. Samarskii and A. N. Tikhonov},
     title = {Andreǐ {Vasil'evich} {Bitsadze} (on the occasion of his seventieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2032--2040},
     year = {1986},
     volume = {22},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_12_a1/}
}