Pham, Xuan Du, Tien Khi Nguyen, Thi Thuy Tran, and Anh Tuan Vu. “Study on the Process of Determination of Cadmium and Lead in Some Vegetables in Lam Thao - PhuTho by F-AAS Method”. Old Journal, no. 134A (June 15, 2019): 20–26. Accessed August 2, 2025. https://jst.vn/index.php/old/article/view/651.