@book { MusikalischeUnterweisungimAltertum,
    title = "Musikalische Unterweisung im Altertum",
    author = "Eckhard {Nolte} and Reinhold {Weyer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135648"
}