@book { DasfolkloristischeElementbeiWolfBiermann,
    title = "Das folkloristische Element bei Wolf Biermann",
    author = "Horst {Löppmann}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832421229",
    url = "https://m.diplom.de/document/217955"
}