IRDA, Sri Viona. Penurunan Geometri Elipsoida Bumi. Jurnal Matematika UNAND, [S. l.], v. 4, n. 4, p. 121–128, 2019. DOI: 10.25077/jmu.4.4.121-128.2015. Disponível em: https://jmua.fmipa.unand.ac.id/index.php/jmua/article/view/517. Acesso em: 3 nov. 2026.