@book { PolandandPolin,
    title = "Poland and Polin",
    author = "Konrad {Matyjaszek} and Irena {Grudzinska-Gross}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06120-8",
    url = "https://www.peterlang.com/document/1049668"
}