On limit cycles that bifurcates from a center in a planar polynomial system.
Qualitative theory of ordinary differential equations: integrability, periodic orb...
Bifurcation of limit cycles in smooth piecewise systems and an application in Medi...
Investigation of polynomial differential systems: classification, bifurcations and...
Dulac's Problem and of the Focus Center on Two-Dimensional Manifolds
Continuous or piecewise smooth dynamical systems on 2 and 3 dimensional manifolds.