@article{TIO_1987_1987_1_a0,
     author = {Delgado, Miguel and Verdegay, Jos\'e Luis and Vila, M.{\textordfeminine} Amparo},
     title = {El problema del \'arbol minimal para grafos difusos.},
     journal = {Trabajos de investigaci\'on operativa},
     pages = {3-20},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1987},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/TIO_1987_1987_1_a0/}
}