@misc{W2117079761,
  author = {Arthur P. Dempster},
  title = {Upper and Lower Probabilities Induced by a Multivalued Mapping},
  year = {2008},
  howpublished = {Studies in fuzziness and soft computing},
  doi = {https://doi.org/10.1007/978-3-540-44792-4\_3}
}