MARTOS, Rubén. Permanence of the torsion-freeness property for divisible discrete quantum subgroups. Mathematica Scandinavica, Berkeley, CA, United States, v. 130, n. 2, 2024. DOI: 10.7146/math.scand.a-143216. Disponível em: https://journals.msp.org/mscand/article/view/55. Acesso em: 24 jul. 2026.