1. Posting compression in dynamic retrieval environments;Aalbersberg,1991
2. A document retrieval model based on term frequency ranks;Aalbersberg,1994
3. Retrieval techniques;Belkin,1987
4. Document retrieval and routing using the INQUERY system;Broglio,1995
5. Automatic routing and ad-hoc retrieval using SMART:TREC 2;Buckley,1994