@article{DBLP:journals/jct/DuYH82,
author = {Ding-Zhu Du and
E. Y. Yao and
Frank K. Hwang},
title = {A Short Proof of a Result of Pollak on Steiner Minimal Trees},
journal = {J. Comb. Theory, Ser. A},
volume = {32},
number = {3},
year = {1982},
pages = {396-400},
ee = {http://dx.doi.org/10.1016/0097-3165(82)90056-5},
bibsource = {DBLP, http://dblp.uni-trier.de}
}