ON THE DIOPHANTINE EQUATION $\frac{4}{n}=\frac{1}{x}+\frac{1}{y}+\frac{1}{z}$. JP Journal of Algebra, Number Theory and Applications, [S. l.], v. 63, n. 5, p. 459–480, 2024. DOI: 10.17654/0972555524028. Disponível em: https://pphmjopenaccess.com/jpjana/article/view/2108. Acesso em: 5 jan. 2026.