@InProceedings{SCI:Xu2006a,
  author =    "S. Xu and M. Styner and B. Davis and S. Joshi and
              G. Gerig",
  title =     "Group Mean Differences of Voxel and Surface
              Objects via Nonlinear Group Averaging",
  booktitle = "Proceedings of {IEEE} International Symposium on
              Biomedical Imaging ({ISBI})",
  pages =     "758--761",
  year =      "2006",
  month =     "April",
  url =       "http://www.sci.utah.edu/publications/xu06/ISBI06_Xu.pdf",
}