@book { ProblemederwirtschaftlichenEntwicklungAlbaniens,
    title = "Probleme der wirtschaftlichen Entwicklung Albaniens",
    author = "Hans-Joachim {Pernack}",
    year = "1972",
    publisher = "Biblion",
    address = ", Germany",
    doi = "10.3726/b12782",
    url = "https://www.peterlang.com/document/1067171"
}