RÖDSETH, Öystein J. On $h$-bases for $n$ II. MATHEMATICA SCANDINAVICA, [S. l.], v. 51, p. 5–21, 1982. DOI: 10.7146/math.scand.a-11960. Disponível em: https://www.mscand.dk/article/view/11960. Acesso em: 1 may. 2024.