@Article{ehricke1992-uma,
  author =          {Ehricke, H. H.},
  author =          {Schad, L. R.},
  author =          {Gademann, G.},
  author =          {Wowra, B.},
  author =          {Engenhart, R.},
  author =          {Lorenz, W. J.},
  title =           {Use of MR angiography for stereotactic planning.},
  journal =         {J Comput Assist Tomogr},
  year =            {1992},
  volume =          {16},
  pages =           {35-40},
  number =          {1},
  institution =     {MR Engineering Group, Siemens Medical Systems, Erlangen, Germany.}}