BIBCYT http://bibcyt.ucla.edu.ve/cgi-win/be_alex.exe?Ultimo&Nombrebd=BIBCYT UCLA - Biblioteca de Ciencias y Tecnologia Felix Morales Bueno Konstan, Joseph A. konstan@cs.umn.edu P Principal Miller, Bradley N. bmiller@netperceptions.com P Principal Maltz, David P Principal Herlocker, Jonathan L. herlock@cs.umn.edu P Principal Gordon, Lee R. rg@nertperceptions.com P Principal Riedl, John P Principal GroupLens: Applying Collaborative Filtering to Usenet News. Vol: 40 pp.77-87.; 28cm.; il