@book { GlaubeundDenken,
    title = "Glaube und Denken",
    author = "Martin {Rothgangel} and Ulrich {Beuttler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103782"
}