HASANOV BEHZOD NORMUROT O‘G‘LI. Operations on Singular and Multiple. American Journal of Education and Evaluation Studies, [S. l.], v. 1, n. 1, p. 38–41, 2024. Disponível em: https://semantjournals.org/index.php/AJEES/article/view/55. Acesso em: 25 jul. 2025.