Principles, procedures and rules in an expert system for information retrieval.

Peretz Shoval Principles, procedures and rules in an expert system for information retrieval. 475-487 1985 21 Inf. Process. Manage. 6 http://dx.doi.org/10.1016/0306-4573(85)90002-0 db/journals/ipm/ipm21.html#Shoval85