N. A. Abdul Karim and A. F. Wahab, “Data Grid Kabur dalam Sistem Maklumat Geografi (GIS): Fuzzy Data Grid in Geographic Information System (GIS)”, J. Sci. Math. Lett., vol. 5, no. 1, pp. 8–18, Dec. 2013, Accessed: Apr. 03, 2025. [Online]. Available: https://ejournal.upsi.edu.my/index.php/JSML/article/view/341