@incollection{27,
  author = {Luis Martínez and Luis Gonzaga Pérez and Jun Liu and J.B Yang and Francisco Herrera},
  title = {A linguistic hierarchical evaluation model for engineering systems},
  year = {2006},
  pages = {295-305},
  publisher = {Elsevier},
  url = {http://www.elsevier.com/wps/find/bookdescription.cws_home/707741/description$\#$description},
}