ISMONQULNING O‘G‘LI, Jovliyev Aziz. Combinatorics about Some Formulas. Excellencia: International Multi-disciplinary Journal of Education (2994-9521), [S. l.], v. 2, n. 6, p. 1037–1040, 2024. DOI: 10.5281/. Disponível em: https://multijournals.org/index.php/excellencia-imje/article/view/1610. Acesso em: 10 nov. 2025.