@article{DE_1970_6_7_a5,
     author = {S. G. Kondratenya},
     title = {The essential singularities of the solutions of certain systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1200--1206},
     publisher = {mathdoc},
     volume = {6},
     number = {7},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1970_6_7_a5/}
}