@book { KoalitionskriseundMitrauensvotum1972,
    title = "Koalitionskrise und Mißtrauensvotum 1972",
    author = "Matthias {Kirchner}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/222172"
}