NJASTAD, Olav. Infinite-Valued Asymptotic Points and Koebe Arcs. MATHEMATICA SCANDINAVICA, [S. l.], v. 19, p. 172–182, 1966. DOI: 10.7146/math.scand.a-10806. Disponível em: https://tidsskrift.dk/math/article/view/10806. Acesso em: 13 aug. 2026.