@InProceedings{SCI:Kur2011a,
  author =    "S. Kurugol and E. Bas and D. Erdogmus and J.G. Dy
              and G.C. Sharp and D.H. Brooks",
  title =     "Centerline extraction with principal curve tracing
              to improve 3D level set esophagus segmentation in
              CT images",
  booktitle = "Proceedings of {IEEE} International Conference of
              the Engineering in Medicine and Biology Society
              ({EMBS})",
  pages =     "3403--3406",
  year =      "2011",
  url =       "http://www.sci.utah.edu/publications/Kur2011a/Kurugol_EMBS2011.pdf",
}