Geometric theory of dynamical systems
Palis & de Melo, Geometric theory of dynamical systems: an introduction
Katok & Hasselblatt, Introduction to the Modern Theory of Dynamical Systems
Nitecki, Differential dynamics
Arnold, Geometrical methods in the theory of differential equations
Hale & Kocac, Dynamics and bifurcations
Meiss, Differential dynamical systems
Barreira & Valls, Dynamical systems: an introduction