Thu Hien, N., Thi Thanh Hien, L., & Phuong Mai, L. (2026). THE RELATIONSHIP BETWEEN CENTRAL AND LOCAL AUTHORITIES IN THE GOVERNANCE MECHANISM OF THE NORTHERN FRONTIER UNDER THE LÝ DYNASTY (1009-1226). HNUE Journal of Science: Journal of Social Sciences, 71(2), 98-108. https://doi.org/10.18173/2354-1067.2026-0029