WEINER, J. L. A spherical Fabricius-Bjerre formula with applications to closed space curves. MATHEMATICA SCANDINAVICA, [S. l.], v. 61, p. 286–291, 1987. DOI: 10.7146/math.scand.a-12205. Disponível em: https://www.mscand.dk/article/view/12205. Acesso em: 1 may. 2024.