Thakur, S. S., Rathor, C. P., & Bajpai, J. P. (2021). Intuitionistic Fuzzy Semi δ-Preopen Sets and Intuitionistic Fuzzy Semi δ-Precontinuity. Journal of the Indonesian Mathematical Society, 27(2), 212–227. https://doi.org/10.22342/jims.27.2.993.212-227