1. Coal Petrology, Its Principles, Methods and Applications;Bustin;Geol. Assoc. Canada, Short Course Notes 3,1985
2. Direct determination of carbon, oxygen and nitrogen content in coal using the electron microprobe;Bustin;Fuel,1992
3. Chemical structure and properties of coal—composition of the individual macerals (vitrinites, fusinites, micrinites and exinites);Dormans;Fuel,1957
4. Elemental ash distribution in coal components—use of the electron probe;Dutcher,1964
5. Separation of coal macerals;Dyrkacz;Fuel,1982