@article{DE_1973_9_2_a29,
     author = {N. N. Bogolyubov and N. P. Erugin and A. V. Bitsadze},
     title = {Vasili{\v\i} {Sergeevi{\v{c}}} {Vladimirov} (on his fiftieth birthday)},
     journal = {Differencialʹnye uravneni\^a},
     pages = {389--391},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_2_a29/}
}