FABRICIUS-BJERRE, Fr. On Helices in the Euclidean $n$-Space. Mathematica Scandinavica, Berkeley, CA, United States, v. 35, p. 159–164, 1974. DOI: 10.7146/math.scand.a-11543. Disponível em: https://journals.msp.org/mscand/article/view/2100. Acesso em: 25 jul. 2026.