Prokip, V. M. “Polynomial Matrices over a Factorial Domain and Their Factorization With Given Characteristic Polynomials”. Ukrains’kyi Matematychnyi Zhurnal 50, no. 10 (October 25, 1998): 1438–1440. Accessed May 18, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4831.