Vijukrattana, Apichit, Netnapid Tantemsapya, wanpen Wirojanagud, and Mongkon Tauon. “Phytoremediation of Heavy Metals Contaminated Soils from Landfill Site Using Sunflower”. Engineering and Applied Science Research 36, no. 4 (June 1, 2012): 293–301. accessed August 31, 2026. https://ph01.tci-thaijo.org/index.php/easr/article/view/1771.