@book { ZenonKardinalGrocholewskiBibliographieundBiographie,
    title = "Zenon Kardinal Grocholewski – Bibliographie und Biographie",
    author = "Elmar {Güthoff}",
    year = "2018",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b14555",
    url = "https://www.peterlang.com/document/1057195"
}