Kokkaew, H., N. . Srithanyarat, and T. . Pitirit. “Optimization of Ingredients Using Response Surface Methodology and Effects of Organic Acids on Phytochemicals and Antioxidant Activities in Extruded Purple Corn Noodle”. Science & Technology Asia, vol. 25, no. 2, June 2020, pp. 97-111, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/185068.