Title: Kachestvennye metody issledovanii︠a︡ nelineĭnykh different︠s︡ialʹnykh uravneniĭ i nelineĭnykh kolebaniĭ : sbornik nauchnykh trudov /
Authors: Mitropolʹskiĭ, I︠U︡. A. 1917-; Mitropolʹskiĭ, I︠U︡. A. 1917-2008; Instytut matematyky (Akademii︠a︡ nauk Ukraïnsʹkoï RSR)
Publisher: In-t matematiki AN USSR,
Year: 1981
Subjects: Differential equations, Nonlinear Congresses.