@book { ConflictofNationalIdentityinSudan,
    title = "Conflict of National Identity in Sudan",
    author = "Kuel {Jok}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-03596-4",
    url = "https://www.peterlang.com/document/1048110"
}