H. Olivier and N. Pinkwart. Eine Prozesskostenanalyse von (E-)Prüfungen. E-Assessments in der Hochschullehre - Einführung, Positionen \& Einsatzbeispiele, PL Academic Research, 2013. H. Olivier and N. Pinkwart. Interactive Voting Systems an der TU Clausthal. E-Assessments in der Hochschullehre - Einführung, Positionen \& Einsatzbeispiele, PL Academic Research, 2013. S. Pörzgen, H. Olivier, J. L. Sackbrook, and N. Pinkwart. Papier oder elektronisch? Eine Prozesskostenanalyse von Klausuren im universitären Umfeld. Tagungsband der 42. Jahrestagung der Gesellschaft für Informatik (INFORMATIK), GI, issue 208, 2012. S. Strickroth, H. Olivier, and N. Pinkwart. Das GATE-System: Qualitätssteigerung durch Selbsttests für Studenten bei der Onlineabgabe von Übungsaufgaben? Tagungsband der 9. e-Learning Fachtagung Informatik (DeLFI), GI, volume 188, issue 188, 2011. H. Olivier, M. Waselewsky, and N. Pinkwart. MusicTagger: Exploiting User Generated Game Data for Music Recommendation. Human-Computer Interaction - Users and Applications. Proceedings of the 14th International Conference on Human Computer Interaction (HCII), Springer Verlag, issue 6764, 2011. H. Olivier and N. Pinkwart. Does "Virtually Being There" Help? Comparing Collaborative Work between 3D and 2D conditions. Proceedings of the 17th CRIWG Conference on Collaboration and Technology (CRIWG), Springer Verlag, issue 6969, 2011. H. Olivier and N. Pinkwart. Towards Supporting Phases in Collaborative Writing Processes. Proceedings of the 6th International Conference on Cooperative Design, Visualization and Engineering (CDVE), Springer Verlag, issue 5738, 2009. N. Pinkwart and H. Olivier. Cooperative Virtual Worlds - a viable eCollaboration pathway or merely a gaming trend? Electronic Markets, Special Issue on eCollaboration, volume 19, issue 4, 2009. C. Mumme, H. Olivier, and N. Pinkwart. A Framework for Interaction Analysis and Feedback in Collaborative Virtual Worlds. Proceedings of the 14th International Conference on Concurrent Enterprising (ICE), Centre for Concurrent Enterprise, 2008. H. Olivier and N. Pinkwart. Collaborative Virtual Environments - Hype or Hope for CSCW? Clausthal University of Technology, Department of Informatics, IFI Technical Report Series, volume 7, issue 14, 2007.