@article{DE_1984_20_9_a27,
     author = {T. K. Nurekenov},
     title = {Solutions of countable systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1640--1642},
     publisher = {mathdoc},
     volume = {20},
     number = {9},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_9_a27/}
}