TONG, Jincheng. Approximation by Nearest Integer Continued Fractions. Mathematica Scandinavica, Berkeley, CA, United States, v. 71, p. 161–166, 1992. DOI: 10.7146/math.scand.a-12418. Disponível em: https://journals.msp.org/mscand/article/view/1233. Acesso em: 24 jul. 2026.