JENSEN, Chr. U. On Homological Dimensions of Rings with Countably Generated Ideals. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 97–105, 1966. DOI: 10.7146/math.scand.a-10784. Disponível em: https://tidsskrift.dk/math/article/view/10784. Acesso em: 14 aug. 2026.