Center conditions for a simple class of quintic systems. Volokitin, Evgenii P. — 2002 International Journal of Mathematics and Mathematical Sciences
Centering conditions for planar septic systems. Volokitin, Evgenii P. — 2003 Electronic Journal of Differential Equations (EJDE) [electronic only]
Uniformly isochronous polynomial centers. Ivanov, Vladimir V.; Volokitin, Evgenii P. — 2005 Electronic Journal of Differential Equations (EJDE) [electronic only]
Bifurcation diagram of a cubic three-parameter autonomous system. Baráková, Lenka; Volokitin, Evgenii P. — 2005 Electronic Journal of Differential Equations (EJDE) [electronic only]