BURILKO, O. A. Separation of variables in linear extensions of dynamical systems on tori. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 48, n. 1, p. 129–132, 1996. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5371. Acesso em: 27 apr. 2025.