@InProceedings{,
   author =     {G. Ramirez and A. P. de Vries},
   title =      {Combining Indexing Schemes to Accelerate Querying XML 
                 on Content and Structure},
   booktitle =  {Proceedings of the Twente Data Management Workshop (TDM)},
   address =    {Entschede, The Netherlands},
   month =      {June},
   pages =      {44-51},
   year =       {2004}
}