JACOBSEN, L. Nearness of continued fractions. MATHEMATICA SCANDINAVICA, [S. l.], v. 60, p. 129–147, 1987. DOI: 10.7146/math.scand.a-12176. Disponível em: https://www.mscand.dk/article/view/12176. Acesso em: 6 may. 2024.