QUADRELLI, Claudio. Pro-$p$ groups with few relations and universal Koszulity. Mathematica Scandinavica, Berkeley, CA, United States, v. 127, n. 1, p. 28–42, 2021. DOI: 10.7146/math.scand.a-123644. Disponível em: https://journals.msp.org/mscand/article/view/159. Acesso em: 24 jul. 2026.