Guy Kortsarz, Zeev Nutov. Tight Approximation Algorithm for Connectivity Augmentation Problems. In Michele Bugliesi, Bart Preneel, Vladimiro Sassone, Ingo Wegener, editors, Automata, Languages and Programming, 33rd International Colloquium, ICALP 2006, Venice, Italy, July 10-14, 2006, Proceedings, Part I. Volume 4051 of Lecture Notes in Computer Science, pages 443-452, Springer, 2006. [doi]
Abstract is missing.