@article{modelinguncertainandvagueknowledgein,
  title = {Modeling uncertain and vague knowledge in possibility and evidence theories},
  author = {Didier Dubois and Henri Prade},
  year = {2013},
  eprint = {1304.2349},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1304.2349v1},
}