@book { TheologiealsBeziehungslehre,
    title = "Theologie als Beziehungslehre",
    author = "Ulrich {Lüders}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1100746"
}