On valuation and optimization problems in fuzzy graphs: A general approach and some particular cases. Delgado, M., Verdegay, J. L, & Vila, M. \ORSA\ Journal on Computing, 2(1):74–83, 1990.
On valuation and optimization problems in fuzzy graphs: A general approach and some particular cases [link]Paper  bibtex   
@Article{delgado_valuation_1990,
  Title                    = {On valuation and optimization problems in fuzzy graphs: A general approach and some particular cases},
  Author                   = {Delgado, Miguel and Verdegay, Jose L and Vila, Maria-Amparo},
  Journal                  = {\{ORSA\} Journal on Computing},
  Year                     = {1990},
  Number                   = {1},
  Pages                    = {74--83},
  Volume                   = {2},

  File                     = {:C$\backslash$:/Users/virgilio/AppData/Roaming/Zotero/Zotero/Profiles/x4f9hvdg.default/zotero/storage/25I9KT9R/cookieAbsent.html:html},
  Shorttitle               = {On valuation and optimization problems in fuzzy gr},
  Url                      = {http://pubsonline.informs.org/doi/abs/10.1287/ijoc.2.1.74}
}

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