1. BCCP-Group (Thurow, J., Fenner, J., Littke, R., (compilers of the contribution), Brumsack, H.-J., Čepek, P., Heydemann, A., Jendrzejewski, L., Keupp, H., Kühn, V., Prauss, M., Prokoph, A., Rachold, V., Riegel, W., Rullkötter, J., Thies, A., Usdowski, E., Weiss, W., Wiedmann, J.), 1994. The Upper Albian of northern Germany: results from the Kirchrode 1/91 borehole, Boreal Cretaceous Cycles Project (BCCP). Zbl. Geol. Palaeont. Teil I, 1993 (7/8), 809–822. Stuttgart.
2. Burger, D., 1995. Timescales 9. Cretaceous-Australian Phanerozoic timescales, biostratigraphic charts, and explanatory notes; second series. AGSO Record 1995/38, pp. 1–35. Canberra.
3. Kalzitisches Nannoplankton der Inoceramen-Mergel (Buntmergelserie, Ultrahelvetikum, Unter-Maastricht) des Moos-Grabens, SE Siegsdorf (Oberbayern);Čepek;Zitteliana,1983
4. Calcareous nannoplankton from the Wiechendorf 1/86 borehole (Barremian to Middle Aptian);Čepek;Geol. Jb.,1995