HERÖY, Hans Olav. Local moduli for plane curve singularities, the dimension of the $\tau$-constant stratum. Mathematica Scandinavica, Berkeley, CA, United States, v. 65, p. 33–40, 1989. DOI: 10.7146/math.scand.a-12262. Disponível em: https://journals.msp.org/mscand/article/view/1388. Acesso em: 24 jul. 2026.