ABDULLAYEVA, Madinaxon Ma’mirjon qizi. FAKTORIAL VA UNING TURLARI. RESEARCH AND EDUCATION, [S. l.], v. 3, n. 8, p. 62–65, 2024. Disponível em: http://researchweb.uz/index.php/researchedu/article/view/61. Acesso em: 10 jan. 2025.