Swaminathan, A., C. Ozel, and I. E. AlShammari. “Hesitant Fuzzy Compactness and Hesitant Fuzzy Regularity in Hesitant Fuzzy Topological Spaces”. European Journal of Pure and Applied Mathematics, vol. 16, no. 3, July 2023, pp. 1381-8, doi:10.29020/nybg.ejpam.v16i3.4768.