@book { FlexibilitasIurisCanonici,
    title = "Flexibilitas Iuris Canonici",
    author = "Andreas {Weiß} and Stefan {Ihli}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1095098"
}