HONG, Bui Thi et al. X-ray Fluorescence (XRF)-based Assessment of Elements in Leafy Vegetables from Phu Tho Province. VNU Journal of Science: Mathematics - Physics, [S.l.], v. 41, n. 4, oct. 2025. ISSN 2588-1124. Available at: <https://js.vnu.edu.vn/MaP/article/view/5073>. Date accessed: 20 dec. 2025. doi: https://doi.org/10.25073/2588-1124/vnumap.5073.