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.
Ari P. J. Vepsäläinen. A relational view of activities for systems analysis and design. Decision Support Systems, 4(2):209-224, 1988. [doi]
Abstract is missing.