1. A brief review of the origin, formation and distribution of coal in Southern Africa;Falcon,1986
2. An introduction to coal petrography: Atlas of petrographic constituents in the bituminous coals of Southern Africa;Falcon,1986
3. Depositional Environments and Coal Petrography of the Permian Karoo sequence: Witbank Coalfields, South Africa;Holland;International Journal of Coal Geology,1989
4. Semi-automated petrographic assessment of coal by coal grain analysis;O’Brien;Minerals Engineering,2007
5. The use of optical reflected light and SEM imaging systems to provide quantitative coal characterisation;O’Brien;Minerals Engineering,2011