entries:
    Lieven2006a:
        type: Misc
        title: '{Pre-MX Spam Filtering with Adaptive Greylisting Based on Retry Patterns}'
        school: Heinrich Heine University, Düsseldorf, Germany
        month: '8'
        year: '2006'
        howpublished: Bachelor's thesis
        author:
        -   first: Peter
            last: Lieven