Khetchatturat, Charn, Utsanee Leerawat, and Pimchana Siricharuanun. 2024. “Powers of Some Special Upper Triangular Matrices: Annual Meeting in Mathematics 2023”. Thai Journal of Mathematics 22 (1):111–118. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1618.