Communications of the ACM
March 97
Recommender systems. Linking users by similar interests
p 19 Sharing Standards
Standardizing Reuse, by Roy Rada and James Moore
DoD DARPA: Software for Adaptable, Reliable Systems (STARS)
Conceptual Framework for Reuse Process (CFRP)
p 56 Recommender systems
PHOAKS, ReferralWeb, Fab, Siteseer, GroupLens...