Mel'nyk, O. M. “Construction of Unital Matrix Polynomials With Mutually Distinct Characteristic Roots”. Ukrains’kyi Matematychnyi Zhurnal 45, no. 1 (January 25, 1993): 69–76. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5784.