@incollection{8,
  author = {Rosa María Rodríguez and Luis Martínez and Francisco Herrera and Vicenç c Torra},
  title = {A Review of Hesitant Fuzzy Sets: Quantitative and Qualitative Extensions},
  year = {2016},
  number = {Studies in Fuzziness and Soft Computing},
  pages = {109-128},
  publisher = {Springer International Publishing},
  issn = {978-3-319-31091-6},
  url = {http://www.springer.com/in/book/9783319310916$\#$aboutBook},
  doi = {10.1007/978-3-319-31093-0},
}