Lau, P. H. M. ., and A. A. . Zawawi. “Analysis of Landslide Occurrence Using DTM-Based Weighted Overlay: A Case Study in Tropical Mountainous Forest of Cameron Highlands, Malaysia: 10.32526/Ennrj/19/202100069”. Environment and Natural Resources Journal, vol. 19, no. 5, Aug. 2021, pp. 358-70, https://ph02.tci-thaijo.org/index.php/ennrj/article/view/244692.