@inproceedings{BK00,
  title = "On the Competitive Ratio of the Work Function Algorithm for the $k$-Server Problem",
  author = "Y. Bartal and E. Koutsoupias",
  year = "2000",
  address = "Lille, France",
  booktitle = "17th Annual Symposium on Theoretical Aspects of Computer Science",
  month = "17--19 feb",
  pages = "605--613",
}