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"Combination Can Be Hard: Approximability of the Unique Coverage Problem."
Erik D. Demaine et al. (2008)
- Erik D. Demaine, Uriel Feige, MohammadTaghi Hajiaghayi, Mohammad R. Salavatipour:
Combination Can Be Hard: Approximability of the Unique Coverage Problem. SIAM J. Comput. 38(4): 1464-1483 (2008)

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