@article{DCG_1991__6_4_131144,
     author = {R.S. Booth},
     title = {Analytic {Formulas} for {Full} {Steiner} {Trees.}},
     journal = {Discrete & computational geometry},
     pages = {69--82},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1991},
     zbl = {0745.05016},
     url = {http://geodesic.mathdoc.fr/item/DCG_1991__6_4_131144/}
}