SUTRISNO, A. D. PREDIKSI KEDALAMAN BATUBARA MENGGUNAKAN TRIANGGULASI DAN KRIGING. KURVATEK, [S. l.], v. 2, n. 1, p. 85–89, 2018. DOI: 10.33579/krvtk.v2i1.249. Disponível em: https://journal.itny.ac.id/index.php/krvtk/article/view/249. Acesso em: 3 apr. 2025.