An introduction to the qualitative theory and bifurcations of dynamical systems
INTRODUCTION TO THE STUDY OF BIFURCATIONS IN UNIDIMENSIONAL AND BIDIMENSIONAL DYNA...
Introduction to the study of limit cycles in planar dynamical systems
Qualitative theory of dynamical systems and applications in the study of physical ...
Qualitative Properties of Continuous and Impulsive Dynamical Systems: Asymptotic D...