CURTIS, Frank. On formulas for the Frobenius number of a numerical semigroup. MATHEMATICA SCANDINAVICA, [S. l.], v. 67, p. 190–192, 1990. DOI: 10.7146/math.scand.a-12330. Disponível em: https://tidsskrift.dk/math/article/view/12330. Acesso em: 14 aug. 2026.