SELMER, Ernst S.; SELVIK, Björg Kristin. On Rödseth’s $h$-bases $A_k=\{1,a_2,2a_2,\dots,(k-2)a_2,a_k\}$. Mathematica Scandinavica, Berkeley, CA, United States, v. 68, p. 180–186, 1991. DOI: 10.7146/math.scand.a-12355. Disponível em: https://journals.msp.org/mscand/article/view/1278. Acesso em: 24 jul. 2026.