RICE, P. M. Circular Flows on $S^3$. MATHEMATICA SCANDINAVICA, [S. l.], v. 21, p. 128–135, 1967. DOI: 10.7146/math.scand.a-10852. Disponível em: https://www.mscand.dk/article/view/10852. Acesso em: 24 nov. 2024.