@book { DeutscheundPolenimSprachkontakt,
    title = "Deutsche und Polen im Sprachkontakt",
    author = "Agnieszka {Nyenhuis}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108133"
}