S. SOONTHORNKALUMP, N. CHUENBOONNGARM, T. JENJITTIKUL, K. THAMMASIRI, and P. SOONTORNCHAINAKSAENG, “Morphological and Stomatal Guard Cell Characteristics of in vitro Kaempferia rotunda L. (Zingiberaceae) through Colchicine Induced Polyploidy”, Walailak J Sci & Tech, vol. 14, no. 3, pp. 235–242, Mar. 2016.