Xayheungsy, Sonexay, and Khiem Le. “Natural Radioactivity in the Soil of Thoulakhom District in Vientiane Province, Laos”. VNUHCM Journal of Advanced Research in Natural Sciences 2, no. 4 (August 13, 2019): 119-125. Accessed April 7, 2026. https://arns.vnuhcmjournal.com.vn/index.php/arns/article/view/819.