@article{GDZPPN000364665, title = {Analytic Formulas for Full Steiner Trees.}, journal = {Discrete \& computational geometry}, volume = {6}, year = {1991}, pages = {69-82}, zbl = {0745.05016}, url = {http://dml.mathdoc.fr/item/GDZPPN000364665} }
Booth, R.S. Analytic Formulas for Full Steiner Trees.. Discrete & computational geometry, Tome 6 (1991) pp. 69-82. http://gdmltest.u-ga.fr/item/GDZPPN000364665/