@article{VollmerTrappSchumannetal.2018,
  author    = {Jan Ole Vollmer and Matthias Trapp and Heidrun Schumann and J{\"u}rgen Roland Friedrich D{\"o}llner},
  title     = {Hierarchical spatial aggregation for level-of-detail visualization of 3D thematic data},
  journal   = {ACM transactions on spatial algorithms and systems},
  volume    = {4},
  number    = {3},
  doi       = {10.1145/3234506},
  year      = {2018},
}