RÖDSETH, Öystein J. Two remarks on linear forms in non-negative integers. Mathematica Scandinavica, Berkeley, CA, United States, v. 51, p. 193–198, 1982. DOI: 10.7146/math.scand.a-11973. Disponível em: https://journals.msp.org/mscand/article/view/1669. Acesso em: 25 jul. 2026.