@article{RO_1991__25_1_5_0,
     author = {Eiselt, Horst A. and Laporte, Gilbert},
     title = {Locational equilibrium of two facilities on a tree},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {5--18},
     publisher = {EDP-Sciences},
     volume = {25},
     number = {1},
     year = {1991},
     mrnumber = {1110770},
     zbl = {0734.90048},
     language = {en},
     url = {http://www.numdam.org/item/RO_1991__25_1_5_0/}
}