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.
Peter Gritzmann, René Brandenberg. Das Geheimnis des kürzesten Weges - ein mathematisches Abenteuer (3. Aufl.). Springer, 2005. [doi]