@article{DCG_1994__12_1_131315,
     author = {B. Aronov and D. Eppstein and M. Bern},
     title = {On the {Number} of {Minimal} {1-Steiner} {Trees.}},
     journal = {Discrete & computational geometry},
     pages = {29--34},
     publisher = {mathdoc},
     volume = {12},
     number = {1},
     year = {1994},
     zbl = {0802.05030},
     url = {http://geodesic.mathdoc.fr/item/DCG_1994__12_1_131315/}
}