Team, Support. “A Combinatorial Formula for Powers of $3 \times 3$ Matrices and Some Combinatorial Identities: Naraporn Na Chanta, Penying Rochanakul”. Thai Journal of Mathematics 18, no. 1 (March 1, 2020). Accessed July 3, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1003.