You may send me an email to the provisional address:

Alternatively, I can be reached by snail mail, or you just drop by (rooms MG 481-489):

• Prof. Klaus Hornberger,
  Faculty of Physics, University of Duisburg-Essen
  Lotharstraße 1-21
  47048 Duisburg, Germany
  

Currently, our our research activities are severely limited and there is no telling of how long it will take. I shall do my best to honor commitments regarding evaluation reports for other universities and funding agencies. I may not be able to send referee reports for journal articles in time, though.

Most of my reseach works can be found via Google Scholar.