Y. S. Samoilenko and V. S. . Shulman, “Representations of correlations of the $і [A, B] = f(A) + g(B)$ type”, Ukr. Mat. Zhurn., vol. 43, no. 1, pp. 110–114, Jan. 1991, Accessed: Dec. 06, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/9313