V. D. Derech, “Finite structurally uniform groups and commutative nilsemigroups”, Ukr. Mat. Zhurn., vol. 70, no. 8, pp. 1072–1084, Aug. 2018, Accessed: Feb. 16, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1618