Rungsit Suwanketnikom, and Anucha Julakasewee. “Hard Seededness and Germination of Small White Flower Morningglory”. Agriculture and Natural Resources 38, no. 4 (August 30, 2004): 425–433. accessed September 14, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/243189.