1. The geology and coal occurrences of Arjo, Wellega;Assefa,1986
2. Re-evaluation of the use of undulatory extinction and polycrystallinity in detrital quartz for provenance interpretation;Basu;Journal of Sedimentary Petrology,1975
3. Origin of red beds in a moist tropical climate (Etrura Formation, Upper Carboniferous, UK);Besly,1983
4. An isochemical model for formation of authigenic kaolinite, K-feldspar and illite in sediments;Bjørkum;Journal of Sedimentary Petrology,1988
5. Diagenetic reaction in sandstone;Bjorlykke,1983