Kampen's Theorem (Discusses generalized versions of van Kampen's theorem applied to topologicalspaces and simplicial sets). Bredon, Glen E. (1993), Topology
ISBN 0-486-42079-5. Narici, Lawrence; Beckenstein, Edward (2011). Topological Vector Spaces. Pure and applied mathematics (Second ed.). Boca Raton, FL: CRC
MR 1299726 (advanced techniques such as the derived category and vanishing cycles on the most reasonable spaces) Mac Lane, Saunders; Moerdijk, Ieke (1994), Sheaves