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