Sangwisat, Juthamas, and Siripong Sirisuk. “Some Properties of Subspaces over Residue Class Rings”. Progress in Applied Science and Technology 14, no. 2 (July 31, 2024): 12–15. accessed September 4, 2026. https://ph02.tci-thaijo.org/index.php/past/article/view/253316.