Hermiyanto, M. H., and N. Sudini Ningrum. “Organic Petrology and Rock-Eval Characteristics in Selected Surficial Samples of the Tertiary Formation, South Sumatra Basin”. Indonesian Journal on Geoscience, vol. 4, no. 3, Sept. 2009, pp. 215-27, doi:10.17014/ijog.4.3.215-227.