LINCHUK, Yu. S. Commutants of some classes of operators associated with shift operators. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 6, p. 859–864, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3351. Acesso em: 7 apr. 2025.