@book { ExilundinnereBiographie,
    title = "Exil und innere Biographie",
    subtitle = "Der Komponist Erich Itor Kahn in seinen Briefen",
    author = "Kathrin {Massar}",
    year = "2010",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135638"
}