@article{oai:niigata-u.repo.nii.ac.jp:00002178,
 author = {Tamura, Shinetsu and Innami, Nobuhiro},
 issue = {2},
 journal = {Nihonkai Mathematical Journal, Nihonkai Mathematical Journal},
 month = {},
 note = {We prove that the Steiner ratios for complete locally compact length spaces having n ends are less than or equal to n/2(n-1). In particular, the Steiner ratio of a complete simply connected surface with a pole satisfying the Visibility axiom is 1/2.},
 pages = {105--110},
 title = {Steiner ratios for length spaces having ends},
 volume = {19},
 year = {2008}
}