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"Lehman's Theorem and the Directed Steiner Tree Problem."
Ahmad Abdi et al. (2016)
- Ahmad Abdi, Andreas Emil Feldmann, Bertrand Guenin, Jochen Könemann, Laura Sanità:
Lehman's Theorem and the Directed Steiner Tree Problem. SIAM J. Discret. Math. 30(1): 141-153 (2016)
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