[1] TIB – Leibniz Information Centre for Science and Technology, Hannover, Germany
[2] University of Brescia, Italy
[3] Universidade de Santiago de Compostela, Spain
[4] Universität zu Köln, Germany
[5] Vienna University of Economics and Business, Austria
[6] Ghent University - imec, Ghent, Belgium
[7] Birmingham City University, United Kingdom
[8] Bharati Vidyapeeth Institute of Computer Applications and Management (BVICAM), New Delhi, India
[9] Institute for Applied Informatics, Leipzig, Germany
[10] IBM Research Almaden, San Jose,CA, United States