Researchr is a web site for finding, collecting, sharing, and reviewing scientific publications, for researchers by researchers.
Sign up for an account to create a profile with publication list, tag and review your related work, and share bibliographies with your co-authors.
Erik D. Demaine, Uriel Feige, MohammadTaghi Hajiaghayi, Mohammad R. Salavatipour. Combination Can Be Hard: Approximability of the Unique Coverage Problem. SIAM Journal on Computing, 38(4):1464-1483, 2008. [doi]
Abstract is missing.