Promsomboon, P., and Promsomboon, S. “Environmental responsibility of rice var. Kum Bangpra and Riceberry in lowland and upland conditions”. International Journal of Agricultural Technology, vol. 15, no. 5, Sept. 2019, pp. 747-52, https://li04.tci-thaijo.org/index.php/IJAT/article/view/8298.