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.
Ralf Jungclaus. Eine Objektlogik für die Sprache Troll:::R:::. In Grundlagen von Datenbanken. pages 73-77, 1993.
Abstract is missing.