@book { DasLichtdesGewissens,
    title = "Das Licht des Gewissens",
    subtitle = "Zu Denkstrukturen Bonaventuras",
    author = "Hermann A. {Baum}",
    year = "1990",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1078070"
}