@book { TheMacedonianKnot,
    title = "The Macedonian Knot",
    subtitle = "The Identity of the Macedonians, as Revealed in the Development of the Balkan League 1878-1914-  The Role of Macedonia in the Strategy of the Entente Before the First World War",
    author = "Ute {Steppan}",
    year = "2009",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106363"
}