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"An approach for the Steiner problem in directed graphs."
Nelson Maculan, Paulo Souza, Alfredo Candia-Véjar (1991)
- Nelson Maculan, Paulo Souza, Alfredo Candia-Véjar
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An approach for the Steiner problem in directed graphs. Ann. Oper. Res. 33(6): 471-480 (1991)
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