Learning Probabilistic User Profiles: Applications for Finding Interesting Web Sites, Notifying Users of Relevant Changes to Web Pages, and Locating Grant Opportunities. - Mark S. Ackerman; Daniel Billsus; Scott Gaffney; Seth Hettich; Gordon Khoo; Dong Joon Kim; Raymond Klefstad; Charles Lowe; Alexius Ludeman; Jack Muramatsu; Kazuo Omori; Michael J. Pazzani; et al. (AI Mag., 1997)