@book { HeinrichMannDieBildvorlagenzumHenriQuatreRoman,
    title = "Heinrich Mann - Die Bildvorlagen zum Henri Quatre-Roman",
    author = "Ekkehard {Blattmann}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1085719"
}