VUGDALIĆ, Ramiz. The Value of Certain Combinatorics Sum. Sarajevo Journal of Mathematics, [S. l.], v. 5, n. 2, p. 247–255, 2024. DOI: 10.5644/SJM.05.2.08. Disponível em: https://www.sjm.anubih.ba/index.php/sjm/article/view/342. Acesso em: 26 jan. 2026.