@book { TheEUsExperienceinIntegration,
    title = "The EU’s Experience in Integration",
    author = "Lisheng {Dong} and Günter S. {Heiduk}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1102580"
}