SARDORBEK M. USMANOV. VARIABILITY AND DIFFERENT LEVELS OF GLOBAL PROBLEMS. American Journal Of Social Sciences And Humanity Research, [S. l.], v. 4, n. 01, p. 129–132, 2024. DOI: 10.37547/ajsshr/Volume04Issue01-21. Disponível em: https://theusajournals.com/index.php/ajsshr/article/view/2385. Acesso em: 24 apr. 2025.