Haron, N. W., and D. M. Moore. “The Significance of Pollen Morphology in the Taxonomy of the Genus Eugenia Linn. (Family: Myrtaceae)”. Malaysian Journal of Science, vol. 15, no. 1&2, June 1994, pp. 39-41, http://mojes.um.edu.my/index.php/MJS/article/view/4757.