Hee-Kap Ahn Sang Won Bae Erik D. Demaine Martin L. Demaine Sang-Sub Kim Matias Korman Iris Reinbacher Wanbin Son Covering Points by Disjoint Boxes with Outliers http://arxiv.org/abs/0910.1643 2009 CoRR abs/0910.1643 db/journals/corr/corr0910.html#abs-0910-1643 informal publication