@article{<a href="http://dblp.uni-trier.de/db/about/bibtex.html">DBLP</a>:journals/tods/DavidLT12,
  author    = {Claire David and
               Leonid Libkin and
               Tony Tan},
  title     = {Efficient reasoning about data trees via integer linear
               programming},
  journal   = {ACM Trans. Database Syst.},
  volume    = {37},
  number    = {3},
  year      = {2012},
  pages     = {19},
  ee        = {http://doi.acm.org/10.1145/2338626.2338632},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}