Noori F.Al-Mayahi, Meeqat Sami Rahaman. “Lattice Metric Space and Their Properties”. Mathematical Statistician and Engineering Applications 72, no. 1 (April 9, 2023): 1020–1036. Accessed July 20, 2026. https://www.philstat.org/index.php/MSEA/article/view/2113.