Kum, V., A. Sharp, and N. Harnpornchai. “A System Dynamic Approach for Financial Planning in Solid Waste Management: A Case Study in Phnom Penh City”. Science & Technology Asia, vol. 9, no. 2, Nov. 2015, pp. 27-34, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41645.