JENSEN, Chr. U. On the Solvability of a Certain Class of Non-Pellian Equations. Mathematica Scandinavica, Berkeley, CA, United States, v. 10, p. 71–84, 1962. DOI: 10.7146/math.scand.a-10514. Disponível em: https://journals.msp.org/mscand/article/view/2670. Acesso em: 25 jul. 2026.