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.
Newton C. A. da Costa, Alexandre A. M. Rodrigues. Definability and Invariance. Studia Logica, 86(1):1-30, 2007. [doi]