Title: I︠A︡kisni metody teoriī dyferentsialʹnykh rivni︠a︡nʹ /
Authors: Kaleni︠u︡k, P. I.; Skorobogatʹko, V. I͡A.; Skorobohatʹko, V. I͡A.
Publisher: "Nauk. dumka",
Year: 1977
Subjects: Differential equations.