CAHYADI, . N. .; DERMAWAN , . A. A. .; MUSLIM, . . STUDI PERUBAHAN IONOSFER AKIBAT LETUSAN GUNUNG BERAPI DENGAN PENGAMATAN TOTAL ELECTRON CONTENT GNSS. GEOID, [S. l.], v. 13, n. 2, p. 196–199, 2018. DOI: 10.12962/geoid.v13i2.1575. Disponível em: https://journal.its.ac.id/index.php/geoid/article/view/1575. Acesso em: 7 dec. 2025.