@inproceedings{ gap,
    author = "Krista Bennett and Christian Grothoff",
    title = "{gap - Practical Anonymous Networking}",
    booktitle = "Designing Privacy Enhancing Technologies",
    publisher = "Springer-Verlag",
    pages = "141--160",	   
    url = "http://gnunet.org/download/aff.ps",
    year = "2003"
}