@book { PersienzwischenEnglandundRussland19181925,
    title = "Persien zwischen England und Russland 1918-1925",
    author = "Werner {Zuerrer}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1070612"
}