Locating the vertices of a Steiner tree in an arbitrary metric space. Sankoff, D. & Rousseau, P. Math Program, 9:240–246, 1975.
bibtex   
@Article{sankoff75locating,
  author    = {Sankoff, D. and P. Rousseau},
  title     = {Locating the vertices of a {Steiner} tree in an arbitrary metric space},
  journal   = {Math Program},
  year      = {1975},
  volume    = {9},
  pages     = {240--246},
  owner     = {maltebrinkmeyer},
  timestamp = {2012.06.18},
}

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