@book { Luther,
    title = "Luther",
    author = "Richard {Faber} and Uwe {Puschner}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-07242-6",
    url = "https://www.peterlang.com/document/1050666"
}