@article{DE_1973_9_11_a27,
     author = {A. V. Bitsadze and N. P. Erugin and V. I. Krylov},
     title = {Viktor {Dmitrievi\v{c}} {Kupradze} (on the occasion of his seventieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2105--2111},
     year = {1973},
     volume = {9},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_11_a27/}
}