@revista_internacional{339,
  keywords = {Comparative linguistic expression, Context-free grammar, group decision-making, Hesitant fuzzy linguistic term set, Linguistic interval},
  author = {Rosa María Rodríguez and Luis Martínez and Francisco Herrera},
  title = {A Group Decision Making Model Dealing with Comparative Linguistic Expressions based on Hesitant Fuzzy Linguistic Term Sets},
  year = {2013},
  journal = {Information Sciences},
  volume = {241},
  number = {1},
  pages = {28-42},
  publisher = {Elsevier},
  url = {http://www.sciencedirect.com/science/article/pii/S0020025513002946},
}