@book { TheEuropeanUnionPresidency,
    title = "The European Union Presidency",
    author = "Leszek {Jesień}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    doi = "10.3726/978-3-0351-0531-5",
    url = "https://www.peterlang.com/document/1052900"
}