@book { ErgnzungenundNachtrge19341942,
    title = "Ergänzungen und Nachträge (1934–1942)",
    author = "Werner {Schubert}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05747-8",
    url = "https://www.peterlang.com/document/1049389"
}