Some Simple E¡ective Approximations to the 2-Poisson Model for ProbabilisticWeightedRetrieval (1994)

by S E Robertson, S Walker
Venue:In:Proceedings of the 17thAnnual ACM-SIGIR Conference on Research and Development in Information Retrieval, 232^241. Reprinted in: K. Sparck Jones and P. Willett (eds) 1997, Readings in Information Retrieval