@article{GDZPPN000365041, title = {The Steiner Ratio Conjecture for Cocircular Points.}, journal = {Discrete \& computational geometry}, volume = {7}, year = {1992}, pages = {77-86}, zbl = {0774.05031}, url = {http://dml.mathdoc.fr/item/GDZPPN000365041} }
Rubinstein, J.H.; Thomas, D.A. The Steiner Ratio Conjecture for Cocircular Points.. Discrete & computational geometry, Tome 7 (1992) pp. 77-86. http://gdmltest.u-ga.fr/item/GDZPPN000365041/