@inproceedings{Noll:2008ab,
    Author = {Michael G. Noll and Christoph Meinel},
    Booktitle = {SITIS '08: IEEE International Conference on Signal Image Technology and Internet-Based Systems},
    Pages = {563--571},
    Publisher = {IEEE Computer Society Press},
    Title = {Building a Scalable Collaborative Web Filter with Free and Open Source Software},
    Year = {2008}
}