@Article{SCI:Chr1995a,
  author =    "G.E. Christensen and R.D. Rabbitt and M.I. Miller
              and S.C. Joshi and U. Grenander and T.A. Coogan",
  title =     "Topological Properties of Smooth Anatomic Maps",
  journal =   "Information Processing in Medical Imaging",
  pages =     "101--112",
  year =      "1995",
}