@book { ElectronicProgramGuides,
    title = "Electronic Program Guides",
    subtitle = "Eine urheberrechtliche Bewertung",
    author = "Sebastian {Kocks} and Stefan {Sporn}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108315"
}