BALASHCHENKO, Vitaly V.; KUNITSA, Victoria N. Invariant f-structures on the four-dimensional oscillator group. Journal of the Belarusian State University. Mathematics and Informatics, [S. l.], n. 1, p. 51–57, 2025. Disponível em: https://journals.bsu.by/index.php/mathematics/article/view/6734. Acesso em: 17 jul. 2026.