Son, N. H., Huong, B. T. L. and Ka, T. T. (2015) “Research on heavy metal accumulation of Cu, Pb, Cd and Zn of the carrot”, International Journal of Agricultural Technology, 11(5), pp. 1119–1127. available at: https://li04.tci-thaijo.org/index.php/IJAT/article/view/6435 (accessed: 27 August 2025).