@book { QuranandReform,
    title = "Quran and Reform",
    author = "Katharina {Völker}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b10650",
    url = "https://www.peterlang.com/document/1050524"
}