Query expansion: advances in research in online catalogues

Concept based query expansion

SIGIR '93 Proceedings of the 16th annual international ACM SIGIR conference on Research and development in information retrieval

Polyrepresentation of information needs and semantic entities: elements of a cognitive theory for information retrieval interaction

SIGIR '94 Proceedings of the 17th annual international ACM SIGIR conference on Research and development in information retrieval

A deductive data model for query expansion

SIGIR '96 Proceedings of the 19th annual international ACM SIGIR conference on Research and development in information retrieval