@book { SozialpolitischeHerausforderungeneinerGesellschaftimWandel,
    title = "Sozialpolitische Herausforderungen einer Gesellschaft im Wandel",
    author = "Oliver {Sievering}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101914"
}