1. Institute for Soil Mechanics and Rock Mechanics, Karlsruhe Institute of Technology; Universität Karlsruhe; Karlsruhe Germany
2. Institute for Industrial Data Processing and Communication; University of Applied Sciences; Mannheim Germany
3. Mathematical Solutions and Engineering; Horn-Bad Meinberg Germany
4. Institute of Material Research and Testing; Bauhaus-University Weimar; Weimar Germany
5. IMKO GmbH; Ettlingen Germany