J. R. Kider and M. N. Gheeab, “Properties of a General Fuzzy Normed Space”, Iraqi Journal of Science, vol. 60, no. 4, pp. 847–855, May 2019, Accessed: Jun. 23, 2026. [Online]. Available: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/636