@incollection{nd05a,
    author = {Nienhaus, Marc and Döllner, Jürgen},
    booktitle = {GPU Gems II: Programming Techniques for High Performance Graphics and General-Purpose Computation},
    publisher = {Addison-Wesley Professional},
    title = {Blueprint Rendering and Sketchy Drawings},
    year = {2005},
    pages = {235--252},
}