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2. Role of sulfur in the transformations of sedimentary organic matter: a mechanistic overview;Aizenshtat,1995
3. Sulfur diagenesis in Everglades peat and origin of pyrite in coal;Altschuler;Science,1983
4. Standard test method for forms of sulfur in coal, D2492-84;American Society for Testing, Materials (ASTM),1989
5. Origin of gray-shale lithofacies (clastic wedges) in U.S. mid-continent coal measures (Pennsylvanian): an alternative explanation;Archer,1993