@book { SchumannsKernerLieder,
    title = "Schumanns Kerner-Lieder",
    author = "Hans-Udo {Kreuels}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1096053"
}