Trinh, Lam Thi Kieu, and Nguyen Thanh Giao. “Evaluating Willingness to Pay for E-Waste Recycling in Vietnam”. Civil Engineering Journal 9, no. 10 (October 1, 2023): 2399–2410. Accessed October 11, 2025. https://www.civilejournal.org/index.php/cej/article/view/4239.