25.
Kroner i in. 2008 – Kroner, U., Mansy, J.-L., Mazur, S., Aleksandrowski, P., Hann, H.P., Huckriede, H., Lacquement, F., Lamarche, J., Ledru, P., Pharoah, T.C., Zedler, H., Zeh, A. i Zulauf, G. 2008 – The Geology of Central Europe, Volume 1: Precambrian and Palaeozoic (ed. T. McCann). Geological Society London, s. 599–664.