@book { AltersdiskriminierungdurchAltersgrenzen,
    title = "Altersdiskriminierung durch Altersgrenzen",
    author = "Martin {Lüderitz}",
    year = "2005",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099849"
}