Evripidis Bampis Martin Skutella Approximation and Online Algorithms, 6th International Workshop, WAOA 2008, Karlsruhe, Germany, September 18-19, 2008. Revised Papers 5426 2009 http://dx.doi.org/10.1007/978-3-540-93980-1 978-3-540-93979-5 WAOA Lecture Notes in Computer Science Springer db/conf/waoa/waoa2008.html