SAMIEV SARDOR ISKANDAROVICH. THE SOURCES OF FUNDING, PROCEDURE AND CHALLENGES OF INVESTMENT ACTIVITY AT OIL AND GAS ENTERPRISES OF UZBEKISTAN. International Journal on Economics, Finance and Sustainable Development, [S. l.], v. 3, n. 5, p. 77–84, 2021. DOI: 10.31149/ijefsd.v3i5.1899. Disponível em: https://journals.researchparks.org/index.php/IJEFSD/article/view/1899. Acesso em: 5 nov. 2026.