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.
Werner Dirlewanger. Performance-Bewertung aus Endbenutzersicht. Praxis der Informationsverarbeitung und Kommunikation, 14(3):172-174, 1991. [doi]