TONG, Jingcheng. Approximation by Nearest Integer Continued Fractions (II). Mathematica Scandinavica, Berkeley, CA, United States, v. 74, p. 17–18, 1994. DOI: 10.7146/math.scand.a-12476. Disponível em: https://journals.msp.org/mscand/article/view/1152. Acesso em: 24 jul. 2026.