NIZAMATDINOV KAYRAT KEUNIMJAEVICH. PROBLEMS OF DETERMINING THE ROLE OF MOBILE COMMUNICATION SERVICES IN THE SERVICE SYSTEM. Ethiopian International Journal of Multidisciplinary Research, [S. l.], v. 11, n. 08, p. 30–35, 2024. Disponível em: https://eijmr.org/index.php/eijmr/article/view/1888. Acesso em: 16 mar. 2026.