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.
Tor J. Larsen, Justus D. Naumann. An experimental comparison of abstract and concrete representations in systems analysis. Information & Management, 22(1):29-40, 1992. [doi]
Abstract is missing.