Suwanphakdee, Chalermpol, and Pranom Chantaranothai. “The monotypic genus Zippelia Blume (Piperaceae): a new record for Thailand”. Thai Forest Bulletin (Botany), no. 37 (November 26, 2014): 147–150. accessed March 31, 2025. https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24347.