M. Hearst. Proceedings of the 14th Conference on Computational Linguistics - Volume 2, Seite 539--545. Stroudsburg, PA, USA, Association for Computational Linguistics, (1992)
S. Walk, P. Singer, und M. Strohmaier. Proceedings of the 23rd ACM International Conference on Conference on Information and Knowledge Management, Seite 1349--1358. New York, NY, USA, ACM, (2014)
L. Tauscher, und S. Greenberg. Proceedings of the ACM SIGCHI Conference on Human Factors in Computing Systems, Seite 399--406. New York, NY, USA, ACM, (1997)