van Welzen, Peter C., and Kongkanda Chayamarit. “THE 11th FLORA OF THAILAND MEETING 1999 LEIDEN, THE NETHERLANDS”. Thai Forest Bulletin (Botany), no. 28 (December 8, 2014): 1. accessed April 7, 2025. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24930.