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.
Ziad S. Nakkouzi, Caroline M. Eastman. Query formulation for handling negation in information retrieval systems. JASIS, 41(3):171-182, 1990.