@book { KlgerundRichteramBett,
    title = "Kläger und Richter am Bett",
    author = "Oleksiy {Levchenko}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842812550",
    url = "https://m.diplom.de/document/228429"
}