Al-Refaei, Abdulkafi A. “Zeta Function for Commuting Matrix Shift of Finite Type”. Thamar University Journal of Natural & Applied Sciences 5, no. 1 (January 28, 2023): 113–119. Accessed July 22, 2024. https://journal.tu.edu.ye/index.php/TUJNAS/article/view/1310.