1. Distributed information retrieval;Callan,2000
2. J. Baker, Meta-Search Engines, UC Berkley Teaching Library Internet Workshop. Available from http://www.lib.berkeley.edu/Teaching>Lib/Guides/Internet/MetaSearch.html>
3. B.T. Bartell, G.W. Cottrell, R.K. Belew, Automatic Combination of Multiple Ranked Retrieval Systems, SIGIR 1994, Dublin, abstract.txtsigir94/sig, 1994
4. N.J. Belkin, P. Kantor, C. Cool, R. Quatrain, Query combination and data fusion for information retrieval, Proc. of the Second Text Retrieval Conf. (TREC-2), 1993, pp. 35–44
5. G. Bordogna, SOft Fusion of Information Accesses, Proc. of the IEEE Int. Conf. On Fuzzy Systems 2002, Honolulu, 24–28 May 2002