@book { UMLUserModeLinux,
    title = "UML - User Mode Linux",
    author = "Christoph {Scharnböck}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836629874",
    url = "https://m.diplom.de/document/226802"
}