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.
M. J. Cresswell. Necessity and contingency. Studia Logica, 47(2):145-149, 1988. [doi]
Abstract is missing.