JENSEN, C. U. On the Solvability of a Certain Class of Non-Pellian Equations. MATHEMATICA SCANDINAVICA, [S. l.], v. 10, p. 71–84, 1962. DOI: 10.7146/math.scand.a-10514. Disponível em: https://www.mscand.dk/article/view/10514. Acesso em: 30 apr. 2024.