@book { WerdenSiedocheinfachGraf,
    title = "Werden Sie doch einfach Graf!",
    author = "Lo {Graf von Blickensdorf}",
    year = "2013",
    publisher = "hey! publishing",
    address = "München, Deutschland",
    doi = "10.3239/9783942822749",
    url = "https://www.heypublishing.com/document/262954"
}