N. Tintarev, и J. Masthoff. Proceedings of the 2007 IEEE 23rd International Conference on Data Engineering Workshop, стр. 801--810. Washington, DC, USA, IEEE Computer Society, (2007)
J. O'Donovan, и B. Smyth. IUI '05: Proceedings of the 10th international conference on Intelligent user interfaces, стр. 167--174. New York, NY, USA, ACM Press, (2005)