@book { Ukraineinmartiallawpoliticalandsecuritychallenges,
    title = "Ukraine in martial law: political and security challenges.",
    author = "Vasyl {Marchuk}",
    year = "2025",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b22863",
    url = "https://www.peterlang.com/document/1559018"
}