@book { BeitrgezumIslamischenRechtIV,
    title = "Beiträge zum Islamischen Recht IV",
    author = "Silvia {Tellenbach} and Thoralf {Hanstein}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1098181"
}