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.
Hartmut Wedekind. Eine Logische Analyse des Verhältnisses von Anwendungs- und Datenbanksystemen. In BTW. pages 19-42, 1989.