Grünthal, G., Bankwitz, P., Bankwitz, E., Bednarek, J., Guterch, B., Schenk, V., Schenková, Z., Zeman, A. (1988): Seismicity and geological features of the eastern part of the West European platform. Recent seismological investigations in Europe, 19th General Assembly of the European Seismological Commission (Moscow 1984) (Moscow).