@book { MehrstimmigkeitundHeterophonie,
    title = "Mehrstimmigkeit und Heterophonie",
    author = "Gernot {Gruber} and August {Schmidhofer} and Michael {Weber}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099001"
}