Marek Cygan, Fabrizio Grandoni, Stefano Leonardi, Marcin Mucha, Marcin Pilipczuk, Piotr Sankowski. Approximation Algorithms for Union and Intersection Covering Problems. In Supratik Chakraborty, Amit Kumar, editors, IARCS Annual Conference on Foundations of Software Technology and Theoretical Computer Science, FSTTCS 2011, December 12-14, 2011, Mumbai, India. Volume 13 of LIPIcs, pages 28-40, Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, 2011. [doi]
Abstract is missing.