1. Aggarwal, C., Wolf, J., Wu, K., Yu, P.: Horting Hatches an Egg: A New Graph-theoretic Approach to Collaborative Filtering. In: Proc. of the ACM KDD 1999, San Diego, CA, pp. 201–212 (1999)
2. Ahmad, M.: Ahmad Wasfy,: Collecting User Patterns for Building User Profiles and Collaborative Filtering. In: IUI 1999, Redondo Beach, CA, USA (1999)
3. Bilmes, J.A.: A gentle tutorial of the em algorithm and its application to parameter estimation for gaussian mixture and hidden markov models. Technical report, International Computer Science Institute, Berkeley California (1998)
4. Borges, M., Pino, J., Valle, C.: Support for Decision Implementation and Follow-Up. Accepted for European Journal of Operations Research (2003)
5. Breese, J., Heckerman, D., Carl, K.: Empirical analysis of predictive algorithms for collaborative filtering. In: Proc. of the Fourteenth Annual Conference on Uncertainty in Artificial Intelligence, pp. 43–52 (1998)