@Article{SCI:Fac2001a,
  author =    "J.C. Facelli and B.K. Nakagawa and A.M. Orendt and
              R.J. Pugmire",
  title =     "Cluster Analysis of C-13 Chemical Shift Tensor
              Principal Values in Polycyclic Aromatic
              Hydrocarbons",
  journal =   "Journal of Physical Chemistry, A",
  volume =    "105",
  pages =     "7468--7472",
  year =      "2001",
  url =       "http://www.sci.utah.edu/publications/Fac2001a/2001_Facelli_Nakagawa_Orendt_Pugmire_Principal_Values_in_Polycyclic_Aromatic_Hydrocarbons.pdf",
}