@book { PolishOrganisationsinGermany,
    title = "Polish Organisations in Germany",
    author = "Michal {Nowosielski}",
    year = "2013",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-02757-0",
    url = "https://www.peterlang.com/document/1047241"
}