KANNAN, K. Invariant Approximation Property for Subgroups. Communications in Mathematics and Applications, [S. l.], v. 12, n. 3, p. 475–481, 2021. DOI: 10.26713/cma.v12i3.1519. Disponível em: https://www.rgnpublications.com/journals/index.php/cma/article/view/1519. Acesso em: 3 may. 2024.