V. A. Pliss

Nonlocal problems of the theory of oscillations
Integralʹnye mnozhestva periodicheskikh sistem different͡s︡ialʹnykh uravneniĭ
Nekotorye problemy teorri ustoĭchivosti dvizhenii͡a︡ v t͡s︡elom
Nelokalʹnye problemy teorii kolebaniĭ