@book { ArbeitFriedeBrot,
    title = "Arbeit, Friede, Brot?",
    author = "Jan {Ocker}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18857",
    url = "https://www.peterlang.com/document/1151134"
}