1. Á. Császár, Fondements de la topologie générale, Budapest-Paris, 1960.
2. J. Dujundji, Topology, Allyn and Bacon, Inc., Boston, 1966.
3. A. García–Máynez and A. Tamariz, Topología General, Porrúa, México, 1988.
4. Property C. Wallman basis and S-metrizability
5. On weakly-pseudocompact spaces;García;Houst J Math,1994