@article{DE_1991_27_10_a8,
     author = {A. I. Yablonskii and Yu. N. Chertoritskii},
     title = {Movable singularities of a cyclic system of differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1720--1724},
     publisher = {mathdoc},
     volume = {27},
     number = {10},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_10_a8/}
}