ORTIKNIYOZOVICH, Urokov Firdavs. The Significance of Theoretical Concepts of Services and Service Activity. American Journal of Economics and Business Management, [S. l.], v. 5, n. 6, p. 43–45, 2022. DOI: 10.31150/ajebm.v5i6.1228. Disponível em: https://globalresearchnetwork.us/index.php/ajebm/article/view/1228. Acesso em: 8 jun. 2025.