@article{DE_1976_12_5_a22,
     author = {N. P. Erugin and A. N. Tikhonov and V. A. Il'in},
     title = {Andreǐ {Vasil'evi\v{c}} {Bicadze} (on the occasion of his sixtieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {947--954},
     year = {1976},
     volume = {12},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1976_12_5_a22/}
}