SCRIVANTI, Susana. Homological Dimension of Pullbacks. Mathematica Scandinavica, Berkeley, CA, United States, v. 71, p. 5–15, 1992. DOI: 10.7146/math.scand.a-12406. Disponível em: https://journals.msp.org/mscand/article/view/1243. Acesso em: 24 jul. 2026.