@article{freedomameasureofsecondorderuncertainty,
  title = {Freedom: A Measure of Second-order Uncertainty for Intervalic Probability Schemes},
  author = {Michael Smithson},
  year = {2013},
  eprint = {1304.1528},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1304.1528v1},
}