@article{DE_1987_23_5_a20,
     author = {N. S. Berezkina},
     title = {Classes of third-order systems with no moving critical points, and evolution equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {885--886},
     publisher = {mathdoc},
     volume = {23},
     number = {5},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_5_a20/}
}