1. Lecture Notes in Computer Science;S. Auer,2007
2. Blei, D.M., Ng, A.Y., Jordan, M.I.: Latent dirichlet allocation. In: Dietterich, T.G., Becker, S., Ghahramani, Z. (eds.) NIPS, pp. 601–608. MIT Press (2001)
3. Cong, G., Wang, L., Lin, C.-Y., Song, Y.-I., Sun, Y.: Finding question-answer pairs from online forums. In: Proceedings of the 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, SIGIR 2008, pp. 467–474. ACM, New York (2008)
4. Cottam, J.A., Menzel, S., Greenblatt, J.: Tutoring for retention. In: Proceedings of the 42nd ACM Technical Symposium on Computer Science Education, SIGCSE 2011, pp. 213–218. ACM, New York (2011)
5. Davis, F.D.: Perceived usefulness, perceived ease of use, and user acceptance of information technology. MIS Quarterly, 319–340 (1989)