@revista_internacional{234,
  keywords = {aggregation, Computing with Words, linguistic preference variables},
  author = {Francisco Herrera and Luis Martínez},
  title = {The 2-tuple Linguistic Computational Model. Advantages of its linguistic description, accuracy and consistency},
  year = {2001},
  journal = {International Journal of Uncertainty , Fuzziness and Knowledge-Based Systems},
  volume = {9},
  number = {1},
  pages = {33-48},
  publisher = {World Scientific},
  url = {http://www.worldscinet.com/ijufks/09/09supp01/S0218488501000971.html},
}