Konyrkhanova, A. A., Nurizinov М. K., Tyulyubergenev, R. K. and Khisamiev, N. G. (2017) “Retracts of group of unitriangular matrices over the ring”, Journal of Mathematics, Mechanics and Computer Science, 91(3), pp. 32–44. Available at: https://bm.kaznu.kz/index.php/kaznu/article/view/342 (Accessed: 25 September 2025).