Paper  bibtex   

@Article{delgado_aggregation_1993,
  Title                    = {{On aggregation operations of linguistic labels}},
  Author                   = {Delgado, M and Verdegay, Jose Luis and Vila, M A},
  Journal                  = {International journal of intelligent systems},
  Year                     = {1993},
  Number                   = {3},
  Pages                    = {351--370},
  Volume                   = {8},

  File                     = {:C$\backslash$:/Users/virgilio/AppData/Roaming/Zotero/Zotero/Profiles/x4f9hvdg.default/zotero/storage/DV3DUINF/abstract.html:html},
  Url                      = {http://onlinelibrary.wiley.com/doi/10.1002/int.4550080303/abstract}
}