@book { SerbischeHeldenlieder,
    title = "Serbische Heldenlieder",
    author = "Hans-Bernd {Harder} and Hans {Lemberg}",
    year = "1996",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12945",
    url = "https://www.peterlang.com/document/1067297"
}