Introduction to the qualitative theory of dynamical systems on surfaces Ch. 1. Dynamical Systems on Surfaces Ch. 2. Structure of Limit Sets Ch. 3. Topological Structure of a Flow Ch. 4. Local Structure of Dynamical Systems Ch. 5. Transformations of the Circle Ch. 6. Classification of Flows on Surfaces Ch. 7. Relation Between Smoothness Properties and Topological Properties of Flows