GOPALAN, M.; KAVITHA, A.; MARY, A. ON THE POSITIVE PELL EQUATION y^2 = 72x^2 + 36. International Journal of Research -GRANTHAALAYAH, [S. l.], v. 5, n. 7(SE), p. 68–74, 2017. DOI: 10.29121/granthaalayah.v5.i7(SE).2017.2126. Disponível em: https://www.granthaalayahpublication.org/journals/granthaalayah/article/view/IJRG17_SE08_10. Acesso em: 8 may. 2024.