@conference{PKDD-06-GarrigaEtAl-ClosedSetsForLabeledData,
   author = {Gemma C. Garriga and Petra Kralj and Nada Lavra\v{c}},
   title = {Closed Sets for Labeled Data},
   booktitle  = {Proceedings of the 10th European Conference on Principles and Practice of Knowledge Discovery in Databases (PKDD'06)},
   year = {2006},
   pages = {163--174},
}