Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Chin-Chen Chang. Optimal information retrieval when queries are not random. Inf. Sci., 34(3):199-223, 1984. [doi]
Abstract is missing.