Chelong, I.- ae, Aulia, F., Bintari, C. N. and Hanum, F. T. (2016) “A Palynology and Classification Study of Some Species in Apocynaceae family at Yala Rajabhat University, Thailand”, YRU Journal of Science and Technology. Yala, Thailand, 1(1), pp. 65–74. available at: https://li01.tci-thaijo.org/index.php/yru_jst/article/view/124424 (accessed: 1 September 2026).