T. Niebler, M. Becker, D. Zoller, S. Doerfel, and A. Hotho. Proceedings of the 25th ACM International on Conference on Information and Knowledge Management, New York, NY, USA, ACM, (2016)
C. Trattner, C. Körner, and D. Helic. Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies, page 18. ACM, (2011)