@book { JosephRatzingerKirchlicheExistenzundexistentielleTheologie,
    title = "Joseph Ratzinger – Kirchliche Existenz und existentielle Theologie",
    author = "Maximilian Heinrich {Heim}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04090-6",
    url = "https://www.peterlang.com/document/1048273"
}