MC RAE, D. George. Homological Dimensions of Finitely Presented Modules. Mathematica Scandinavica, Berkeley, CA, United States, v. 28, p. 70–76, 1971. DOI: 10.7146/math.scand.a-11006. Disponível em: https://journals.msp.org/mscand/article/view/2288. Acesso em: 25 jul. 2026.