@book { MndlicheberlieferungundaltrmischerChoral,
    title = "Mündliche Überlieferung und altrömischer Choral",
    author = "Max {Haas}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1085981"
}