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.
Loïc Colson, David Michel. Pedagogical Natural Deduction Systems: the Propositional Case. J. UCS, 13(10):1396-1410, 2007. [doi]
Abstract is missing.