Team S. Falling Shadow Theory Applied to UP-Algebras: Young Bae Jun, Kyoung Ja Lee, Aiyared Iampan. Thai J Math [Internet]. 2019 Feb. 4 [cited 2024 Dec. 22];17(1):1-9. Available from: https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/870