@inproceedings{fre-sto-tyg-07-rtcel, 
  author = {Lucas Freitas and Jorge Stolfi and Martin Tygel},
  title = {Fast Ray Tracing in a Cellular Model},
  booktitle = {Proceedings of the 10th International Congress of the Brazilian Geophysical Society (CISBGf 2007)},
  location = {Rio e Janeiro, RJ, Brazil},
  number = {CD-ROM, Paper 316/File 317},
  year = 2007,
  month = nov,
  pages = {1--5},
  publisher = {Sociedade Brasileira de Geof{\'{\i}}sica}
}