Asymptotic behavior of the Hibert number in polynomial and piecewise polynomial pl...
On limit cycles in piecewise linear vector fields with algebraic discontinuity var...
Limit cycles, regularization and period function of piecewise smooth planar systems.
Integrability of two-dimensional polynomial differential systems
Qualitative theory of differential equations in the plane: topological classificat...
Regularization of planar Filippov Systems near a codimension one singularity