References
- M. B. Gorzalczany, A method of inference in approximate reasoning based on interval-valued fuzzy sets, J. Fuzzy Math. 21 (1987), 1-17.
-
Y. B. Jun, G. C. Kang and M.A. Ozturk Interval-valued fuzzy semiopen, preopen and
$\alpha$ -open mappings, Honam Math. J., 28(2), (2006) pp. 241-259. - T. K. Mondal and S. K. Samanta, Topology of interval-valued fuzzy sets , Indian J. Pure Appl. Math., 30(1), (1999) pp. 23-38.
- L. A. Zadeh, Fuzzy sets, Information and Control 8 (1965), 338-353. https://doi.org/10.1016/S0019-9958(65)90241-X