@book { TheCollapseoftheBipolarWorldandtheNewIdentityinEasternEuropeandItsSubRegions,
    title = "The Collapse of the Bipolar World and the New Identity in Eastern Europe and Its Sub-Regions",
    author = "Kinga Anna {Gajda}",
    year = "2025",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b23308",
    url = "https://www.peterlang.com/document/1618767"
}