1. Toland W G. Oxidation of organic compounds with aqueous sulfate. J Am Chem Soc, 1960, 82:1911–1916
2. Orr W L. Changes in sulfur content and isotope ratios of sulfur during petroleum maturation study of Big Horn basin Paleozoic oils. Am Assoc Pet Geol Bull, 1974, 58:2295–2318
3. Orr W L. Geologic and geochemical controls on the distribution of hydrogen sulfide in natural gas. In: Campos R, Goni J, eds. Advances in Organic Geochemistry. Oxford: Pergamon Press, 1977. 571–597
4. Sassen R, Moore C H. Framework of hydrocarbon generation and destruction in eastern Smackover Trend. Am Assoc Pet Geol Bull, 1988, 72:649–663
5. Kiyosu Y, Krouse H R. Carbon isotope effect during abiogenic oxidation of methane. Earth Planet Sci Lett, 1989, 95:302–306