@article{DE_1968_4_2_a9,
     author = {I. D. Shinderman},
     title = {Infinite systems of linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {276--282},
     publisher = {mathdoc},
     volume = {4},
     number = {2},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_2_a9/}
}