SAMOILENKO , Yu. S.; SHULMAN , V. S. Representations of correlations of the $і [A, B] = f(A) + g(B)$ type. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 43, n. 1, p. 110–114, 1991. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9313. Acesso em: 6 dec. 2025.