Pietzsch, C. External Organizations;
Kämpf, Horst 4.3 Organic Geochemistry, 4.0 Chemistry and Material Cycles, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Pietzsch, C., Kämpf, H. (1993): Moessbauer investigations of siegenite - An attempt at structural analysis. - Neues Jahrbuch für Mineralogie Monatshefte, 6, 265-277.