DIMCA, A.; GIBSON, C. G. Classification of Equidimensional contact unimodular map germs. Mathematica Scandinavica, Berkeley, CA, United States, v. 56, p. 15–28, 1985. DOI: 10.7146/math.scand.a-12085. Disponível em: https://journals.msp.org/mscand/article/view/1542. Acesso em: 25 jul. 2026.