CATHELINEAU, Jean-luis. On the homology of $\mathrm{SL}_2$, a complement. Mathematica Scandinavica, Berkeley, CA, United States, v. 66, p. 17–20, 1990. DOI: 10.7146/math.scand.a-12288. Disponível em: https://journals.msp.org/mscand/article/view/1331. Acesso em: 24 jul. 2026.