1. Late Wenlock graptolite-bearing tuffaceous sandstone from Bornholm, Denmark;Bjerreskov;Bull. Geol. Soc. Den.,1983
2. Gradients of vitrinite reflectance and present temperature in the Los Angeles and Ventura Basins, California;Bostick,1978
3. Reflectance of vitrinite-like macerels as a thermal maturity index for Cambrian-Ordovician alum shale, southern Scandinavia;Buchardt;Bull. Am. Assoc. Pet. Geol.,1990
4. Carbon and oxygen isotope composition of Cambro-Silurian limestone and antraconite from Bornholm: Evidence for deep burial diagenesis;Buchardt;Bull. Geol. Soc. Den.,1985
5. Carbon isotope composition of Lower Palaeozoic kerogen: effects of maturation;Buchardt;Org. Geochem.,1986