MC RAE, D. George. Homological Dimensions of Finitely Presented Modules. MATHEMATICA SCANDINAVICA, [S. l.], v. 28, p. 70–76, 1971. DOI: 10.7146/math.scand.a-11006. Disponível em: https://tidsskrift.dk/math/article/view/11006. Acesso em: 14 aug. 2026.