Koi, Satoshi, and Masahiro Kato. “Endemism and evolution of Podostemaceae in Phou Khao Khouay National Park, Lao PDR”. Thai Forest Bulletin (Botany) 50, no. 2 (October 25, 2022): 135–145. accessed April 7, 2025. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/254338.