@INPROCEEDINGS{cheng09ecmlpl,
  author = {Weiwei Cheng and Eyke H\"ullermeier},
  title = {Label ranking with partial abstention using ensemble learning},
  booktitle = {Workshop Proceedings of Preference Learning},
  year = {2009},
  pages = {17--23},
  address = {Bled, Slovenia},
  month = {September}
}