CARVALHO, F. J. Craveiro De. A projective Gauss map associated with a hypersurface and a hyperplane. Mathematica Scandinavica, Berkeley, CA, United States, v. 50, p. 145–148, 1982. DOI: 10.7146/math.scand.a-11951. Disponível em: https://journals.msp.org/mscand/article/view/1694. Acesso em: 25 jul. 2026.