@book { SdosteuropaindeninternationalenpolitischenBeziehungenderGegenwart,
    title = "Südosteuropa in den internationalen politischen Beziehungen der Gegenwart",
    author = "Franz {Ronneberger}",
    year = "1968",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12807",
    url = "https://www.peterlang.com/document/1067190"
}