@book { DerErsteWeltkrieginMitteleuropa,
    title = "Der Erste Weltkrieg in Mitteleuropa",
    author = "",
    year = "2020",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b16700",
    url = "https://www.peterlang.com/document/1118323"
}