KOSYAK, O. V. Elementary Representations of the Group $B_0^ℤ$ of Upper-Triangular Matrices Infinite in Both Directions. I. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 54, n. 2, p. 205–216, 2002. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4056. Acesso em: 5 dec. 2025.