JIVALL, Lotti; SAANDAR, Mijiddorj. The National Reference MONREF97 in Mongolia and its developments. Mongolian Geoscientist, [S. l.], n. 49, p. 63, 2019. Disponível em: https://test.mongoliajol.info/MGS/article/view/1229. Acesso em: 27 oct. 2025.