entries:
    Lieven2007a:
        type: InProceedings
        title: '{Filtering Spam Email Based on Retry Patterns}'
        year: '2007'
        pages: 1515-1520
        month: '6'
        booktitle: 'ICC 2007: Proceedings of the IEEE International Conference on
            Communications'
        location: Glasgow, Scotland, UK
        author:
        -   first: Peter
            last: Lieven
        -   first: Björn
            last: Scheuermann
        -   first: Michael
            last: Stini
        -   first: Martin
            last: Mauve