References
- K. T. Atanassov, 'Intuitionistic fuzzy sets', Fuzzy Sets and Systems, vol. 20, no. 1, pp. 87-96, 1986 https://doi.org/10.1016/S0165-0114(86)80034-3
- K. C. Chattopadhyay, R. N. Hazra, and S. K. Samanta, 'Gradation of openness: Fuzzy topology', Fuzzy Sets and Systems, vol. 49, pp. 237-242, 1992 https://doi.org/10.1016/0165-0114(92)90329-3
- M. H. Ghanim, O. A. Tantawy, F. M. Selim, 'Gradation of supra-openness', Fuzzy Sets and Systems, vol. 109, pp. 245-250, 2000 https://doi.org/10.1016/S0165-0114(97)00342-4
- R. N. Hazra, S. K. Samanta, K. C. Chattopadhyay, 'Fuzzy topology redefined', Fuzzy Sets and Systems, vol. 45, pp. 79-82, 1992 https://doi.org/10.1016/0165-0114(92)90093-J
- T. K. Mondal and S. K. Samanta, 'On intuitionistic gradation of openness', Fuzzy Sets and Systems, vol. 131, pp. 323-336, 2002 https://doi.org/10.1016/S0165-0114(01)00235-4
- A. A. Ramadan, 'Smooth topological spaces', Fuzzy Sets and Systems, vol. 48, pp. 371-375, 1992 https://doi.org/10.1016/0165-0114(92)90352-5
- L. A. Zadeh, 'Fuzzy sets', Information and Control, vol. 8, pp. 338-353, 1965 https://doi.org/10.1016/S0019-9958(65)90241-X