@book { DasFrancoRegimeinSpanien,
    title = "Das Franco-Regime in Spanien",
    author = "Walther L. {Bernecker}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-07167-2",
    url = "https://www.peterlang.com/document/1050765"
}