GULLIKSEN, T. H. A Note on the Homology of Local Rings. MATHEMATICA SCANDINAVICA, [S. l.], v. 21, p. 296–300, 1967. DOI: 10.7146/math.scand.a-10864. Disponível em: https://www.mscand.dk/article/view/10864. Acesso em: 6 may. 2024.