@article{QUE_1988_1988_1_a15,
     author = {Basart, Josep M. and Huguet, Lloren\c{c}},
     title = {Arboles m{\'\i}nimos y \'arboles de {Steiner} en la m\'etrica rectil{\'\i}nea.},
     journal = {Q\"uestii\'o},
     pages = {159-174},
     publisher = {mathdoc},
     volume = {12},
     number = {2},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/QUE_1988_1988_1_a15/}
}