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.
Horst Oberquelle. Sprachkonzepte für benutzergerechte Systeme. Volume 144 of Informatik-Fachberichte, Springer, 1987.