@INPROCEEDINGS{CleCrePenRosVoc01,
  AUTHOR =       {A. Clementi and P. Crescenzi and P. Penna and G. Rossi and P. Vocca},
  TITLE =        {On the Complexity of Computing Minimum Energy Consumption Broadcast Subgraphs},
  BOOKTITLE =    {Proc. of the 18th Annual Symposium on Theoretical Aspects of Computer Science (STACS)},
  YEAR =         {2001},
  pages =        {121-132},
  series =       {LNCS},
  volume =       {2010}
}