BEKKA, M. E. B.; KANIUTH, E. Topological Frobenius properties for nilpotent groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 63, p. 282–296, 1988. DOI: 10.7146/math.scand.a-12241. Disponível em: https://www.mscand.dk/article/view/12241. Acesso em: 5 may. 2024.