@book { RechtsgeschftealterMenscheninbesonderenZwangslagen,
    title = "Rechtsgeschäfte alter Menschen in besonderen Zwangslagen",
    author = "Kai {Mückenheim}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1085592"
}