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.
Christopher S. Helvig, Gabriel Robins, Alexander Zelikovsky. An improved approximation scheme for the Group Steiner Problem. Networks, 37(1):8-20, 2001. [doi]