1. R. Brooks, Coincidences, Roots, and Fixed Points, Thesis, University of California, Los Angeles, 1967.
2. R. Brown, Lefschetz Fixed Point Theorem, Scott, Freshman and Company, 1971.
3. R. Dobreńko and J. Jezierski, The coincidence Nielsen theory on non-otientable manifolds, Rocky Mountain Journal of Mathematics, 23 (1993), 67–85.
4. J. Guo and P. Heath, Coincidence theory on the complement, Topology and its Applications, 95 (1999), 229–250.
5. A. Hatcher, Algebraic Topology, Cambridge University Press, 2002.