@book { AnEmergingInstitution,
    title = "An Emerging Institution?",
    subtitle = "Multiple Citizenship in Europe – Views of Officials",
    author = "Devorah {Kalekin-Fishman} and Pirkko {Pitkänen}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Lausanne, Switzerland",
    url = "https://www.peterlang.com/document/1102609"
}