@book { Konversion,
    title = "Konversion",
    subtitle = "Zur Aktualität eines Jahrhundertthemas",
    author = "Christian {Henning} and Erich {Nestler}",
    year = "2002",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095567"
}