Sunardi, Edy. “The Lithofacies Association of Brown Shales In Kiliran Jao Subbasin, West Sumatra Indonesia”. Indonesian Journal on Geoscience 2, no. 2 (June 28, 2015): 77–90. Accessed June 7, 2025. https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/211.