Nur Eva Hayati, Sutevee Sukprakarn, and Sunanta Juntakool. “Seed Germination Enhancement in Solanum stramonifolium and Solanum torvum”. Agriculture and Natural Resources, vol. 39, no. 3, Sept. 2005, pp. 368-76, https://li01.tci-thaijo.org/index.php/anres/article/view/243325.