Averaging theory for finding periodic solutions of Carathéodory differential equat...
Topological methods in the study of periodic solutions of non-smooth differential ...
Detecting k-hyperbolic orbits and period-doubling bifurcations
Averaging theory for studying invariant tori and periodic behavior in differential...
Averaging Theory for studying the periodic solutions of the differential systems a...
Invariant Sets in differential Dynamical Systems: Periodic orbits, Invariant Tori ...
Introduction to the qualitative theory of differential equations