@article{DE_1973_9_10_a7,
     author = {V. V. Nikonenko},
     title = {Certain properties of the $O$-curves of first order equations with factored right-hand side},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1810--1816},
     publisher = {mathdoc},
     volume = {9},
     number = {10},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1973_9_10_a7/}
}