Singphan, N., and S. Yoddee. “In Vitro Growth of Dioscorea Alata L. By Different Concentrations of Mannitol”. Naresuan Phayao Journal, Vol. 13, no. 1, Apr. 2020, pp. 21-25, https://li01.tci-thaijo.org/index.php/journalup/article/view/221381.