Quy Giang, Pham, Kanchana Nakhapakorn, and Achara Ussawarujikulchai. “Effectiveness of different spatial interpolators in estimating heavy metal contamination in shallow groundwater: a case study of arsenic contamination in Hanoi, Vietnam”. Environment and Natural Resources Journal 9, no. 1 (April 7, 2017): 31–37. accessed September 18, 2026. https://ph02.tci-thaijo.org/index.php/ennrj/article/view/82460.