@article{DAN_1968_181_5_a6,
     author = {I. T. Kiguradze},
     title = {Monotonic solutions of $n$th-order nonlinear ordinary differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {1054--1057},
     year = {1968},
     volume = {181},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_181_5_a6/}
}