- Introduction to the Qualitative Theory of Differential Systems: Planar, Symmetric and Continuous Piecewise Linear Systems
- Inverse Problems in Ordinary Differential Equations and Applications
- Qualitative Theory of Planar Differential Systems
- Structurally Unstable Quadratic Vector Fields of Codimension One
- Geometric Configurations of Singularities of Planar Polynomial Differential Systems: A Global Classification in the Quadratic Case