Eng, W. H., Ho, W. S., and Ling, K. H. “Effects of colchicine treatment on morphological variations of Neolamarckia cadamba”. International Journal of Agricultural Technology, vol. 17, no. 1, Jan. 2021, pp. 47-66, https://li04.tci-thaijo.org/index.php/IJAT/article/view/5900.