@article{rd13,
    author = {Richter, Rico and Döllner, Jürgen},
    journal = {Computers, Environment and Urban Systems},
    title = {Concepts and techniques for integration, analysis and visualization of massive 3D point clouds},
    year = {2013},
    pages = {114--124},
    volume = {45},
    doi = {10.1016/j.compenvurbsys.2013.07.004},
}