@inproceedings{ElekBauszat2014progressivespectral,
  title = {Progressive Spectral Ray Differentials},
  author = {Elek, Oskar and Bauszat, Pablo and Ritschel, Tobias and Magnor, Marcus and Seidel, Hans-Peter},
  booktitle = {Proc. Vision, Modeling and Visualization ({VMV})},
  organization = {Eurographics},
  pages = {151--158},
  month = {Oct},
  year = {2014}
}