Bormann, P. External Organizations;
Grünthal, Gottfried 2.6 Seismic Hazard and Stress Field, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
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Bormann, P., Grünthal, G. (1990): Main results of the complex seismological monitoring, 5th International Seminar and Exhibition on Earthquake Prognostics (Lagos, Nigeria 1990) (Lagos).