@book { DieleuchtendeStadt,
    title = "Die leuchtende Stadt",
    author = "Fridolin {Schley}",
    year = "2013",
    publisher = "hey! publishing",
    address = "München, Deutschland",
    doi = "10.3239/9783956070105",
    url = "https://www.heypublishing.com/document/266328"
}