SUKRETNIY, K. On *-representations of the perturbation of twisted CCR. Methods of Functional Analysis and Topology, [S. l.], v. 15, n. 4, p. 384–390, 2009. Disponível em: https://zen.imath.kiev.ua/index.php/mfat/article/view/432. Acesso em: 16 dec. 2025.