HERYANTO, Rachmat; SUYOKO, Suyoko. Karakteristik batubara di Cekungan Bengkulu. Indonesian Journal on Geoscience, [S. l.], v. 2, n. 4, p. 247–259, 2007. DOI: 10.17014/ijog.2.4.247-259. Disponível em: https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/42. Acesso em: 5 may. 2025.