@book { GeopoliticsofCentralandEasternEuropeinthe21stCentury,
    title = "Geopolitics of Central and Eastern Europe in the 21st Century",
    author = "Ágnes {Bernek}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b18155",
    url = "https://www.peterlang.com/document/1059066"
}