@book { DasneuegeistlicheLied,
    title = "Das neue geistliche Lied",
    author = "René {Frank}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832449414",
    url = "https://m.diplom.de/document/220508"
}