KONYRKHANOVA, A. A.; Nurizinov М. K.; TYULYUBERGENEV, R. K.; KHISAMIEV, N. G. Retracts of group of unitriangular matrices over the ring. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 91, n. 3, p. 32–44, 2017. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/342. Acesso em: 3 jul. 2024.