Hamood, M. T., and R. N. Majeed. “Pairwise Lower Separation Axioms in C ̌ech Fuzzy Soft Bi-Closure Spaces”. Al-Qadisiyah Journal of Pure Science, Vol. 26, no. 4, Aug. 2021, pp. 405–422, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/1414.