@book { DieLiturgieInstruktionRedemptionisSacramentumvon2004,
    title = "Die Liturgie-Instruktion «Redemptionis Sacramentum» von 2004",
    author = "Heribert {Schmitz}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099735"
}