Luyen, B. K. (2014) “REFINING GEOIDAL HEIGHTS COMPUTED BY FULLY-NORMALISED SPHERICAL HARMONICS COEFFICIENTS OF THE EARTH GRAVITATIONAL MODEL EGM2008 BY ADJUSTMENT OF COMBINED GPS/LEVELLING/GEOID NETWORK”, Vietnam Journal of Earth Sciences, 36(2), pp. 169–174. doi: 10.15625/0866-7187/36/2/4498.