Topology optimization in structural and continuum mechanics George I.N. Rozvany, Tomasz Lewinski, editors (CISM courses and lectures, 549) Springer , CISM, c2014
Algebraic Topology(Allen Hatcher)
Chapter 0. Some Underlying Geometric Notions
Chapter 1. The Fundamental Group
Chapter 2. Homology
Chapter 3. Cohomology
Chapter 4. Homotopy Theory