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.
Peter K. Schotch, Raymond E. Jennings. Inference and necessity. J. Philosophical Logic, 9(3):327-340, 1980. [doi]