Thu Hien N, Thi Thanh Hien L, Phuong Mai L. 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 [Internet]. 2026 Apr. 22 [cited 2026 Aug. 24];71(2):98-108. Available from: http://hnuejs.edu.vn/ss/article/view/1366