@misc{indiciae2976eabb835a,
  title = {Hierarchical and Parallelizable Direct Volume Rendering for Irregular and Multiple Grids},
  author = {Wilhelms, Jane and VanGelder, Allen and Tarantino, Paul and Gibbs, Jonathan},
  year = {1996},
  url = {https://ntrs.nasa.gov/citations/19970021350},
  note = {Source identifier: 19970021350}
}