@book { BahnhofsmissionBchen,
    title = "Bahnhofsmission Büchen",
    subtitle = "Ein Spalt im Eisernen Vorhang",
    author = "Jann-Thorge {Thöming}",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16978",
    url = "https://www.peterlang.com/document/1111422"
}