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.
Duccio Luchi, Franco Montagna. An Operational Logic of Proofs with Positive and Negative Information. Studia Logica, 63(1):7-25, 1999.
Abstract is missing.