@string{WAOA03 = {1st Workshop on Approximation and Online Algorithms}} 

@InProceedings{KN03b,
  author =       {E. Koutsoupias and A. Nanavati},
  title =        {The online matching problem on a line},
  booktitle =    WAOA03,
  pages =        {179--191},
  year =         2003,
  address =      {Budapest, Hungary},
}