@Article{tvcg08-falk,
  author = {Falk, M. and Weiskopf, D.},
  title  = {{Output-Sensitive 3D Line Integral Convolution}},
  year   = {2008},
  pages  = {820-834},
  journal = {{IEEE Transactions on Visualization and Computer Graphics}},
  volume = {{14}},
  number = {{4}}
}