R. Mihalcea, and A. Csomai. Proceedings of the Sixteenth ACM Conference on Conference on Information and Knowledge Management, page 233--242. New York, NY, USA, ACM, (2007)
C. di Sciascio, D. Strohmaier, M. Errecalde, and E. Veas. Proceedings of the 22Nd International Conference on Intelligent User Interfaces, page 377--388. New York, NY, USA, ACM, (2017)