@book { TheologiederReligionen,
    title = "Theologie der Religionen",
    author = "Gerhard {Gäde}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18521",
    url = "https://www.peterlang.com/document/1150640"
}