@book { ReflexionundTat,
    title = "Reflexion und Tat",
    author = "Maciej {Potepa} and Wolfgang H. {Schrader}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1093689"
}