WISETYA, Daffa Kresna; PURWANTORO; CARUDIN. IMPLEMENTASI HAVERSINE FORMULA PADA RANCANG BANGUN APLIKASI POSYANDU MENGGUNAKAN FRAMEWORK FLUTTER. INFOTECH journal, [S. l.], v. 12, n. 1, p. 40–46, 2026. DOI: 10.31949/infotech.v12i1.17354. Disponível em: https://www.ejournal.unma.ac.id/index.php/infotech/article/view/17354. Acesso em: 13 jun. 2026.