@Article{SCI:Fle2004b,
  author =    "P.T. Fletcher and S. Joshi",
  title =     "Principal Geodesic Analysis on Symmetric Spaces:
              Statistics of Diffusion Tensors",
  journal =   "Computer Vision and Mathematical Methods in
              Medical and Biomedical Image Analysis",
  volume =    "3117",
  pages =     "87--98",
  year =      "2004",
  series =    "Springer-Verlag, Lecture Notes In Computer
              Science",
  doi =       "10.1109/TMI.2004.831793",
  url =       "http://www.sci.utah.edu/publications/fletcher04/CVAMIA04_Fletcher_DTStats.pdf",
}