BEZUSHCHAK, O. E.; SUSHCHANSKII, V. I. Groups of Periodically Defined Linear Transformations of an Infinite-Dimensional Vector Space. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 67, n. 10, p. 1299–1308, 2015. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2067. Acesso em: 5 dec. 2025.