@article{DE_1979_15_3_a1,
     author = {A. I. Kolosov},
     title = {An approach to the study of monotone solutions of $n$th-order nonlinear ordinary differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {392--397},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_3_a1/}
}