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.
Wolfgang Lenzen. Ploucquet's "Refutation" of the Traditional Square of Opposition. Logica Universalis, 2(1):43-58, 2008. [doi]
Abstract is missing.