Kim, Jae Woon (1998). "A Note on Quasi-Open Maps"(PDF). Journal of the Korean Mathematical Society. B: The Pure and Applied Mathematics. 5 (1): 1–3. Archived from the original(PDF) on March 4, 2016. Retrieved October 20, 2011.
web.archive.org
Kim, Jae Woon (1998). "A Note on Quasi-Open Maps"(PDF). Journal of the Korean Mathematical Society. B: The Pure and Applied Mathematics. 5 (1): 1–3. Archived from the original(PDF) on March 4, 2016. Retrieved October 20, 2011.