HANCL, Jaroslav; STEPNICKA, Jan. A note on irrationality measures. MATHEMATICA SCANDINAVICA, [S. l.], v. 104, n. 1, p. 117–123, 2009. DOI: 10.7146/math.scand.a-15088. Disponível em: https://www.mscand.dk/article/view/15088. Acesso em: 6 dec. 2025.