Personalized search.
A Cooccurrence-Based Thesaurus and Two Applications to Information Retrieval.
Inf. Process. Manage.
Commun. ACM
Pedersen JO
Breuel TM
Adar E
Edmonds A
Turnbull D
Cooley R
Building learner's ontologies to assist personalized search of learning objects.
A Survey of Automatic Query Expansion in Information Retrieval.