Jaroslaw Byrka, Shanfei Li, Bartosz Rybicki. Improved Approximation Algorithm for k-Level UFL with Penalties, a Simplistic View on Randomizing the Scaling Parameter. In Christos Kaklamanis, Kirk Pruhs, editors, Approximation and Online Algorithms - 11th International Workshop, WAOA 2013, Sophia Antipolis, France, September 5-6, 2013, Revised Selected Papers. Volume 8447 of Lecture Notes in Computer Science, pages 85-96, Springer, 2013. [doi]
Abstract is missing.