@inproceedings{stumme2004iceberg,
  address = {Heidelberg},
  author = {Stumme, Gerd},
  booktitle = {Conceptual Structures at Work: 12th International Conference on Conceptual Structures (ICCS 2004)},
  comment = {alpha},
  editor = {Wolff, Karl Erich and Pfeiffer, Heather D. and Delugach, Harry S.},
  interhash = {5e81311b4e69d49a2f0aa7cd3f52b21d},
  intrahash = {70b05439d41b24c2476e9eba1f74ec87},
  pages = {109-125},
  publisher = {Springer},
  series = {LNCS},
  title = {Iceberg Query Lattices for Datalog},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/2004/stumme2004iceberg.pdf},
  volume = 3127,
  year = 2004
}

@inproceedings{stumme2004iceberg,
  address = {Heidelberg},
  author = {Stumme, Gerd},
  booktitle = {Conceptual Structures at Work: 12th International Conference on Conceptual Structures (ICCS 2004)},
  comment = {alpha},
  editor = {Wolff, Karl Erich and Pfeiffer, Heather D. and Delugach, Harry S.},
  interhash = {5e81311b4e69d49a2f0aa7cd3f52b21d},
  intrahash = {70b05439d41b24c2476e9eba1f74ec87},
  pages = {109-125},
  publisher = {Springer},
  series = {LNCS},
  title = {Iceberg Query Lattices for Datalog},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/2004/stumme2004iceberg.pdf},
  volume = 3127,
  year = 2004
}

@article{DT99,
  author = {Dehaspe, L. and Toivonen, H.},
  interhash = {eb17bc1d3cea0dc35d4875bd5386a5d7},
  intrahash = {53fa388ae74f5dec8c8fb89b66006fed},
  journal = {Data Mining and Knowledge Discovery},
  location = {Santa Barbara, CA},
  number = 1,
  pages = {7--36},
  title = {Discovery of Frequent Datalog Patterns},
  volume = 3,
  year = 1999
}