@book { DieDobrudschaEinneuerGrenzraumderEuropischenUnion,
    title = "Die Dobrudscha. Ein neuer Grenzraum der Europäischen Union",
    author = "Wilfried {Heller} and Josef {SALLANZ}",
    year = "2009",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b11922",
    url = "https://www.peterlang.com/document/1056256"
}