@article{DE_1997_33_8_a9,
     author = {G. S. Balashova},
     title = {Differential equations of infinite order with subordinate terms},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1076--1084},
     publisher = {mathdoc},
     volume = {33},
     number = {8},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_8_a9/}
}