@article{DAN_1990_312_3_a0,
     author = {M. L. Gorbachuk and I. T. Matsishin},
     title = {Behavior at infinity of solutions of a first-order differential},
     journal = {Doklady Akademii Nauk},
     pages = {521--524},
     publisher = {mathdoc},
     volume = {312},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_312_3_a0/}
}