KANIUTH, Eberhard. Topological Frobenius properties for nilpotent groups. II. MATHEMATICA SCANDINAVICA, [S. l.], v. 68, p. 89–107, 1991. DOI: 10.7146/math.scand.a-12348. Disponível em: https://tidsskrift.dk/math/article/view/12348. Acesso em: 14 aug. 2026.