สุขญาณกิจ ส. and พาณิชพัฒน์ ธ. (2013) “Comparison of Growth and Lead Accumulation of Sunflower and Sorghum in Lead Contaminated Soil”, KKU Science Journal, 41(4), pp. 996–1007. available at: https://ph01.tci-thaijo.org/index.php/KKUSciJ/article/view/249204 (accessed: 27 August 2026).