@INPROCEEDINGS{cheng10ecmla,
  author = {Weiwei Cheng and Micha\"el Rademaker and Bernard De Baets and Eyke H\"ullermeier},
  title = {Predicting partial orders: ranking with abstention},
  booktitle = {LNAI 6321 Machine Learning and Knowledge Discovery in Databases: ECML PKDD 2010},
  year = {2010},
  pages = {215--230},
  publisher = {Springer},
  editor = {Jos\'{e} Luis Balc\'{a}zar and Francesco Bonchi and Aristides Gionis and Mich\`{e}le Sebag},
  address = {Barcelona, Spain},
  month = {September}
}