@book { Klangfarbe,
    title = "Klangfarbe",
    subtitle = "Vergleichend-systematische und musikhistorische Perspektiven",
    author = "August {Schmidhofer} and Stefan {Jena}",
    year = "2011",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1107681"
}