@article{DE_1991_27_5_a25,
     author = {N. I. Avdonin and V. N. Belykh and L. N. Belyustina and M. V. Dolov and Yu. I. Neimark and S. F. Morozov},
     title = {Nikolaǐ {Fedorovich} {Otrokov}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {912--913},
     year = {1991},
     volume = {27},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_5_a25/}
}