@article{DE_1997_33_5_a22,
     author = {N. A. Lukashevich and I. P. Martynov},
     title = {The {Riccati} equation and special third-order systems without moving critical points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {707--708},
     year = {1997},
     volume = {33},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_5_a22/}
}