RAMASAMY, A. Diophantine quadruples of numbers whose elements are in proportion. Tamkang Journal of Mathematics, [S. l.], v. 48, n. 3, p. 241–249, 2017. DOI: 10.5556/j.tkjm.48.2017.1972. Disponível em: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/1972. Acesso em: 21 nov. 2024.