@book { RationierungimGesundheitswesenundPatientenschutz,
    title = "Rationierung im Gesundheitswesen und Patientenschutz",
    author = "Klaus {Vosteen}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1091682"
}