NIEMENMAA, M.; ROSENBERGER, G. On Connected Transversals in Finite Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 70, p. 172–176, 1992. DOI: 10.7146/math.scand.a-12393. Disponível em: https://tidsskrift.dk/math/article/view/12393. Acesso em: 13 aug. 2026.