Almohammed, Raghad, and L. A. A. Jabar. “Cluster Outer Points via Proximity Spaces”. Iraqi Journal of Science 65, no. 2 (February 29, 2024): 863–871. Accessed December 15, 2025. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/8776.