@inproceedings{ACKK-MFCS09,
  title = "An Improved Approximation Bound for Spanning Star Forest and Color Saving",
  author = "Athanassopoulos, Stavros and Caragiannis, Ioannis and Kaklamanis, Christos and Kyropoulou, Maria",
  year = "2009",
  booktitle = "Proceedings of the 34th International Symposium on Mathematical Foundations of Computer Science (MFCS)",
  isbn = "978-3-642-03815-0",
  pages = "90--101",
  series = "MFCS '09",
  url = "http://dx.doi.org/10.1007/978-3-642-03816-7_9",
  doi = "10.1007/978-3-642-03816-7_9",
}