Y. A. Drozd and L. V. . Izyumchenko, “Representations of Ɗ-kinds”, Ukr. Mat. Zhurn., vol. 44, no. 4, pp. 572–574, Apr. 1992, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/7904