Brumsack, H. J.; Thurow, J. (1986): The geochemical facies of black shales from the Cenomanian/Turonian boundary event (CTBE). Geologisches Staatsinstitut, Hamburg, Federal Republic of Germany, In: Degens, E. T., Meyers, P. A., Brasell, S. C., Biogeochemistry of black shales; case studies from a workshop, 60, 247-265, georefid:1988-051003