@book { DieAnpassungvonBetriebsrentengem16BetrAVG,
    title = "Die Anpassung von Betriebsrenten gemäß § 16 BetrAVG",
    author = "Ingeborg {Axler}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1096051"
}