Kummalue, T., P. Sujiwatanarat, P. Wongcharoen, P. Parichatikanond, J. Ngernmeesri, and S. Sukpanichnant. “Mutational Analyses of K-ras Exon 2 in Thailand Colorectal Cancer Tissue Samples”. Siriraj Medical Journal, vol. 63, no. 1, Mar. 2020, pp. 4-7, https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/240821.