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C. S. Helvig, Gabriel Robins, and Alexander Zelikovsky. Improved approximation bounds for the group Steiner problem. In Proc. Conference on Design Automation and Test in Europe, pages 406--413, Paris, France, February 1998.

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This paper is cited by the following papers:

Rectilinear Group Steiner Trees and Applications in VLSI Design - Rohe, Zachariasen   (Correct)
An Improved Approximation Scheme for the Group Steiner.. - Helvig, Robins, Zelikovsky (2001)   (1 citation)  Self-citation (Helvig Robins Zelikovsky)   (Correct)
New Approximation Algorithms for Routing with Multi-Port.. - Helvig, Robins..   Self-citation (Helvig Robins Zelikovsky)   (Correct)

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