1. K. Borsuk, Theory of Retracts. Monografie Matematyczne 44, PWN, Warsaw, 1967.
2. K. Borsuk, Theory of Shape. Lecture Notes Series 28, Matematisk Institut, Aarhaus Universitet, Aarhaus, 1971.
3. R. Engelking, General Topology. PWN, Warsaw, 1977.
4. L. Górniewicz, Topological Methods in Fixed Point Theory of Multivalued Mappings. Springer, Dordrecht, The Netherlands, 2006.
5. Keesling J. E.: A non-movable trivial-shape decomposition of the Hilbert cube. Bull. Acad. Polon. Sci. Sér. Sci. Math. Astronom. Phys. 23, 997–998 (1975)