@Article{SCI:Kin2007a,
  author =    "G. Kindlmann and D.B. Ennis and R.T. Whitaker and
              C.-F. Westin",
  title =     "Diffusion Tensor Analysis With Invariant Gradients
              and Rotation Tangents",
  journal =   "{IEEE} Transactions on Medical Imaging",
  volume =    "26",
  number =    "11",
  pages =     "1483--1499",
  year =      "2007",
  keywords =  "DTI, diffusion tensor imaging",
  url =       "http://www.sci.utah.edu/publications/kindlmann07/Kindlmann_TMI2007.pdf",
}