@article{<a href="http://dblp.uni-trier.de/db/about/bibtex.html">DBLP</a>:journals/pvldb/HueskePSRBKT12,
  author    = {Fabian Hueske and
               Mathias Peters and
               Matthias Sax and
               Astrid Rheinl{\"a}nder and
               Rico Bergmann and
               Aljoscha Krettek and
               Kostas Tzoumas},
  title     = {Opening the Black Boxes in Data Flow Optimization},
  journal   = {PVLDB},
  volume    = {5},
  number    = {11},
  year      = {2012},
  pages     = {1256-1267},
  ee        = {http://vldb.org/pvldb/vol5/p1256_fabianhueske_vldb2012.pdf},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}