@book { CyberSicherheitsstrategiefrDeutschland,
    title = "Cyber-Sicherheitsstrategie für Deutschland",
    author = "Alexander {Silhavy}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656357728",
    url = "https://www.hausarbeiten.de/document/208453"
}