HOA, Ha Minh. Construction of initial national quasi-geoid model VIGAC2017, first step to national spatial reference system in Vietnam. <b>Vietnam Journal of Earth Sciences</b>, <i>[S. l.]</i>, v. 39, n. 2, p. 155–166, 2017. DOI: 10.15625/0866-7187/39/2/9702. Disponível em: http://vjes.vast.vn/jse/article/view/9702. Acesso em: 8 nov. 2025.