@book { CrossBorderServicesandChoiceofLaw,
    title = "Cross-Border Services and Choice of Law",
    subtitle = "A Comparative Study of the European Approach",
    author = "Ulla {Liukkunen}",
    year = "2006",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101871"
}