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"Efficient Sets in Graphs."
Philip J. Bernhard, Stephen T. Hedetniemi, David Pokrass Jacobs (1993)
- Philip J. Bernhard
, Stephen T. Hedetniemi, David Pokrass Jacobs:
Efficient Sets in Graphs. Discret. Appl. Math. 44(1-3): 99-108 (1993)
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