@book { OttoDixandtheFirstWorldWar,
    title = "Otto Dix and the First World War",
    author = "Michael {Mackenzie}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Oxford, United Kingdom",
    doi = "10.3726/b13361",
    url = "https://www.peterlang.com/document/1056900"
}