Abdukhalilovna, Mavrulova Nilufar. “Factors and Principles of Improving the Hierarchical System of Sale of Insurance Products”. International Journal on Economics, Finance and Sustainable Development 5, no. 6 (June 7, 2023): 29-37. Accessed July 3, 2024. https://journals.researchparks.org/index.php/IJEFSD/article/view/4466.