1. Variations in the properties of vitrinite in isometamorphic coal;Brown;Fuel,1964
2. Reflectance of vitrinite-like macerals as a thermal maturity index for Cambrian–Ordovician Alum Shale, southern Scandinavia;Buchardt;American Association of Petroleum Geologists Bulletin,1990
3. Coalification;Callcott;Australian Institute of Energy Coal Science Conference, Newcastle, Proceedings,1986
4. Reflectance of oxidised coals;Chandra;Economic Geology,1958
5. Effect of storage of coals on reflectance and petrological composition;Chandra;Economic Geology,1966