Buntoro, Aris, et al. “Vertical Fracability Model on Lithofacies Association of Brownshale Formation from Outcrop Analog Using Rock Mechanical and Mineralogy Correlation Method: A Preliminary Study of Shale Hydrocarbon Development in Bengkalis Trough, Central Sumatra Basin”. Indonesian Journal on Geoscience, vol. 9, no. 1, Jan. 2022, pp. 87-104, doi:10.17014/ijog.9.1.87-104.