BISGAARD, Torben Maack. Correction of an error in the paper "characterization of perfect involution groups". Mathematica Scandinavica, Berkeley, CA, United States, v. 89, n. 1, p. 133–134, 2001. DOI: 10.7146/math.scand.a-14334. Disponível em: https://journals.msp.org/mscand/article/view/871. Acesso em: 24 jul. 2026.