Title: Desi͡a︡tai͡a︡ Mezhdunarodnai͡a︡ konferent͡s︡ii͡a︡ po nelineĭnym kolebanii͡a︡m : Varna, 12-17 senti͡a︡bri͡a︡ 1984
Subjects: Congresses, Nonlinear oscillations