@inproceedings{mpref/Lackner13-incompletesp,
  author = {Martin Lackner},
  title = {Incomplete Preferences in Single-Peaked Electorates},
  booktitle = {Proceedings of the 7th Multidisciplinary Workshop on Advances in Preference Handling (M-Pref'13)},
  year = {2013},
  pdf = {http://www.dbai.tuwien.ac.at/staff/lackner/publications/incompletesp.pdf}
}