@article{DE_1989_25_3_a24,
     author = {V. A. Pron'ko},
     title = {A class of third-order equations with an irrational right-hand side without moving critical points},
     journal = {Differencialʹnye uravneni\^a},
     pages = {535--537},
     publisher = {mathdoc},
     volume = {25},
     number = {3},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_3_a24/}
}