BEKKA, Mohammed E. B.; KANIUTH, Eberhard. 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://tidsskrift.dk/math/article/view/12241. Acesso em: 14 aug. 2026.