AMDEBERHAN, Tewodros; TAURASO, Roberto. A congruence for a double harmonic sum. Scientia Series A: Mathematical Sciences, [S. l.], v. 29, p. 37–44, 2019. DOI: 10.71712/072m-gf12. Disponível em: https://revistas.usm.cl/scientia/article/view/38. Acesso em: 10 oct. 2025.