BRUCE, J. W. Projections and reflections of generic surfaces in $\mathsf{R}^3$. MATHEMATICA SCANDINAVICA, [S. l.], v. 54, p. 262–278, 1984. DOI: 10.7146/math.scand.a-12058. Disponível em: https://www.mscand.dk/article/view/12058. Acesso em: 24 nov. 2024.