@book { AlbanieninVergangenheitundGegenwart,
    title = "Albanien in Vergangenheit und Gegenwart",
    author = "Klaus-Detlev {Grothusen}",
    year = "1991",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12556",
    url = "https://www.peterlang.com/document/1082626"
}