@book { WeitereNachtrge19341939,
    title = "Weitere Nachträge (1934 – 1939)",
    author = "Werner {Schubert}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16108",
    url = "https://www.peterlang.com/document/1058463"
}