Introduction to geometric theory of ordinary differential equations
The study of periodic orbits in piecewise continuous differential systems
An introduction to the qualitative theory and bifurcations of dynamical systems
Qualitative study of linear and nonlinear ordinary differential equations
Qualitative theory of ordinary differential equations: integrability, periodic orb...
Study of the Qualitative Theory of Ordinary Differential Equations
Qualitative methods for ordinary differential equations applied to the study of Li...