Zimmermann, Günter 4.1 Reservoir Technologies, 4.0 Chemistry and Material Cycles, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Zimmermann, G. (2008): Deep geothermal energy - Hydraulic fracturing treatments to enhance productivity, (Proceedings), International Seminar on Renewable Energies and Efficient Use of Energy in Mining in Latin America (Santiago de Chile, Chile 2008) (Santiago).