@inproceedings{nd04a,
    author = {Nienhaus, Marc and Döllner, Jürgen},
    booktitle = {3rd International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa (ACM AFRIGRAPH)},
    title = {Sketchy Drawings},
    year = {2004},
    pages = {73--81},
    publisher = {ACM Press},
    issn = {1-58113-863-6},
}