Yiarayong, P., P. Panpho, and R. Tanjaroenrat. “On Prime and Quasi Prime Ideals in AG-Groupoids”. Science & Technology Asia, vol. 19, no. 1, Mar. 2014, pp. 52-56, https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/17077.