Phonsena, Phongsak, and Peter Wilkie. “Scaphium affine (Mast.) Pierre (Sterculiaceae) new for Thailand”. Thai Forest Bulletin (Botany), no. 36 (December 8, 2014): 61–69. accessed April 2, 2025. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24181.