The infimum type of dual fuzzy semi-metric and the supremum type of dual fuzzy semi-metric are proposed in this paper.
Hsien-Chung Wu 2018, 'Convergence in Fuzzy Semi-Metric Spaces', Mathematicshttp://www.mdpi.com/2227-7390/6/9/170. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)