Truong, Nguyen Ngoc, and Tran Van Nhac. 2017. “Determination of the Constant <i>W</i><sub>o</sub> For Local Geoid of Vietnam and it’s Systematic Deviation from the Global Geoid”. Vietnam Journal of Marine Science and Technology 17 (4B):138-44. https://doi.org/10.15625/1859-3097/17/4B/13001.