@article{LaubRothBuhmannetal.2006,
  author    = {Julian Laub and Volker Roth and Joachim Buhmann and Klaus-Robert M{\"u}ller},
  title     = {On the information and representation of non-Euclidean pairwise data},
  doi       = {10.1016/j.patcog.2006.04.016},
  url       = {http://www.sciencedirect.com/science/journal/00313203},
  year      = {2006},
}