PERMANA, Asep K.; WARD, C. R.; GURBA, L. W. Maceral Characteristics and Vitrinite Reflectance Variation of The High Rank Coals, South Walker Creek, Bowen Basin, Australia. Indonesian Journal on Geoscience, [S. l.], v. 8, n. 2, p. 63–74, 2013. DOI: 10.17014/ijog.8.2.63-74. Disponível em: https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/156. Acesso em: 6 feb. 2025.