@Article{eurovis08-schafhitzel,
  author = {Schafhitzel, T. and Vollrath, J. and Gois, J. and Weiskopf, D. and Castelo, A. and Ertl, T.},
  title  = {{Topology-Preserving lambda2-based Vortex Core Line Detection for Flow Visualization}},
  year   = {2008},
  pages  = {1023--1030},
  journal = {{Computer Graphics Forum (Eurovis 2008)}},
  volume = {{27}},
  number = {{3}}
}