ZhiMei Fu, Kezheng Zuo, and Yang Chen. “New Characterizations of K-Normal and K-EP Matrices: DOI: 10.48129/Kjs.16087”. Kuwait Journal of Science 49, no. 4 (September 25, 2022). Accessed May 6, 2026. https://journals.ku.edu.kw/kjs/index.php/KJS/article/view/16087.