Do, Nguyen Duy, Dang Nam Chinh, and Sisomphone Insisiengmay. 2012. “Refinement Anomalous Elevation EGM2008 Base on GPS-Levelling Data in Local Region Tay Nguyen and South Central Coastal Areas”. Vietnam Journal of Earth Sciences 34 (1):85-91. https://doi.org/10.15625/0866-7187/34/1/1057.