Thapyai, C., P. Wilkin, and K. Chayamarit. “Dioscorea Craibiana Prain & Burkill: An Endemic Thai Yam Rediscovered, With New Data on Its Distribution and the Morphology of the Male Plant”. Thai Forest Bulletin (Botany), no. 33, Dec. 2014, pp. 185-92, https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24315.