Hadjirezaei, Somayeh, and Somayeh Karimzadeh. “Matrix Rings over a Principal Ideal Domain in Which Elements Are Nil-Clean”. Journal of Algebra Combinatorics Discrete Structures and Applications 3, no. 2 (May 15, 2016): 91–96. Accessed September 12, 2026. https://www.jacodesmath.com/index.php/jacodesmath/article/view/34.