@book { ReligiseErziehungindenAnstaltenfrGeistesschwache,
    title = "Religiöse Erziehung in den Anstalten für Geistesschwache",
    author = "Reinhard {Thoma}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1086969"
}