@book { LiedBibliographieSongBibliography,
    title = "Lied-Bibliographie - Song Bibliography",
    subtitle = "Die Literatur über das Kunstlied- Reference to Literature on the Art Song",
    author = "Wolfgang {Walter}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099083"
}