Romaniv, A.M., and V.P. Shchedryk. “Reduction of Invertible Matrices by Two-Sided Transformations from Zelisko Groups to a Simpler Form”. Carpathian Mathematical Publications 16, no. 2 (December 8, 2024): 500–511. Accessed January 18, 2025. https://ktipe.pnu.edu.ua/index.php/cmp/article/view/7552.