ZAHARIA, A. On simple germs with non-isolated singularities. Mathematica Scandinavica, Berkeley, CA, United States, v. 68, p. 187–192, 1991. DOI: 10.7146/math.scand.a-12356. Disponível em: https://journals.msp.org/mscand/article/view/1279. Acesso em: 24 jul. 2026.