HUGHES, Meri T.; JORGENSEN, David A.; SEGA, Liana M. Acyclic complexes of finitely generated free modules over local rings. Mathematica Scandinavica, Berkeley, CA, United States, v. 105, n. 1, p. 85–98, 2009. DOI: 10.7146/math.scand.a-15107. Disponível em: https://journals.msp.org/mscand/article/view/590. Acesso em: 24 jul. 2026.