Pham, Nguyen Quoc, and Giao Thanh Nguyen. “Evaluating Groundwater Quality Using Multivariate Statistical Analysis and Groundwater Quality Index”. Civil Engineering Journal 10, no. 3 (March 1, 2024): 699–713. Accessed July 1, 2025. https://www.civilejournal.org/index.php/cej/article/view/4801.