@book { PolenundDeutscheinEuropaPolacyiNiemcywEuropie,
    title = "Polen und Deutsche in Europa- Polacy i Niemcy w Europie",
    author = "Michael {Düring} and Krzysztof {Trybus}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-04588-8",
    url = "https://www.peterlang.com/document/1048693"
}