1. The genesis of coal from the viewpoint of coal petrology;Teichmüller;Intern. J. Coal Geol.,1989
2. Physical and chemical properties of macerals from Polish Coals;Ziółkowski,1960
3. Die biochemische Inkohlung des Exinits im Mikrobild;Stach;Brennstoff-Chemie,1962
4. Biochemical alteration of exinites and the origin of some semifusinites;Bell;Fuel,1966
5. A further study of change in coal macerals;Ghosh;Fuel,1972