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"On the Hardness of 4-Coloring a 3-Colorable Graph."
Venkatesan Guruswami, Sanjeev Khanna (2000)
- Venkatesan Guruswami, Sanjeev Khanna:
On the Hardness of 4-Coloring a 3-Colorable Graph. CCC 2000: 188-197
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