Thapyai, C., P. Wilkin, and K. Chayamarit. “The Dioscorea species of Doi Chiang Dao with particular reference to Dioscorea collettii Hook. f. (Dioscoreaceae), a new record for Northern Thailand”. Thai Forest Bulletin (Botany), no. 33, Dec. 2014, pp. 213-9, https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24320.