@article{DE_1987_23_9_a25,
     author = {N. A. Sotnichenko},
     title = {On the problem of the splitting of systems of differential equations that are dependent on two parameters},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1640--1643},
     publisher = {mathdoc},
     volume = {23},
     number = {9},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_9_a25/}
}