Chantarasuwan, B., R. W. J. M. van Der Ham, B.-J. van Heuven, and P. C. van Welzen. “Pollen Morphology of Ficus Subsection Urostigma (Moraceae)”. Thai Forest Bulletin (Botany), no. 42, Dec. 2014, pp. 52-60, https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24915.