@INPROCEEDINGS{MonPenSil07,
  AUTHOR =       {A. Monti and P. Penna and R. Silvestri},
  TITLE =        {An Equivalent Version of the Caccetta-Haeggkvist Conjecture in an Online Load Balancing Problem},
  BOOKTITLE =    {Proc. of the 33rd International Workshop on Graph-Theoretic Concepts in Computer Science (WG)},
  YEAR =         {2007},
  series  =      {LNCS},
  note =         {to appear}
}