@article{DE_1969_5_7_a17,
     author = {S. G. Kondratenya and A. I. Yablonskii},
     title = {The singularities of the solutions of certain systems of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1321--1323},
     publisher = {mathdoc},
     volume = {5},
     number = {7},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_7_a17/}
}