1. Otto-von-Guericke University Universitaetsplatz 2 39106 Magdeburg Germany
2. University of Belgrade Institute of Chemistry, Technology and Metallurgy Njegoseva 12 11000 Belgrade Serbia
3. Max-Planck-Institut für Dynamik komplexer technischer Systeme Sandtorstr. 1 39106 Magdeburg Germany
4. University of Belgrade Faculty of Technology and Metallurgy, Department of Chemical Engineering Karnegijeva 4 11000 Belgrade Serbia