@article{vtsd2018,
    author = {Vollmer, Jan Ole and Trapp, Matthias and Schumann, Heidrun and Döllner, Jürgen},
    journal = {ACM Transactions on Spatial Algorithms and Systems},
    title = {Hierarchical Spatial Aggregation for Level-of-Detail Visualization of 3D Thematic Data},
    year = {2018},
    issn = {2374-0353},
    number = {3},
    pages = {9:1--23},
    volume = {4},
    acmid = {3234506},
    articleno = {9},
    doi = {10.1145/3234506},
    numpages = {23},
    publisher = {ACM},
}