M. H., O. On power series and Mahler’s U-numbers. MATHEMATICA SCANDINAVICA, [S. l.], v. 65, p. 143–151, 1989. DOI: 10.7146/math.scand.a-12273. Disponível em: https://www.mscand.dk/article/view/12273. Acesso em: 23 nov. 2024.