@book { RudolfAlexanderSchrderundErnstZinnBriefwechsel19341961,
    title = "Rudolf Alexander Schröder und Ernst Zinn: Briefwechsel 1934–1961",
    author = "Hans-Albrecht {Koch}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15858",
    url = "https://www.peterlang.com/document/1057034"
}