1. Organic geochemistry of thermally metamorphosed fossil wood;Allan;Fuel,1975
2. Calculation of coking charges on the basis of petrographic characteristics of coals;Ammosov;Koks Khim.,1957
3. Biochemical alteration of exinites and the origin of some semifusinites;Bell;Fuel,1966
4. Botryococcus and the algal coals: Part I. A reinvestigation of the alga Botryococcus braunii Kützing. Part II. The boghead controversy and the morphology of the boghead algae;Blackburn;Trans. R. Soc. Edinb.,1933
5. An X-ray study of the structure of coals, cokes and chars;Blayden,1944