@book { AdvancesinUnderstandingMultilingualismAGlobalPerspective,
    title = "Advances in Understanding Multilingualism: A Global Perspective",
    author = "Sambor {Grucza} and Magdalena {Olpińska-Szkiełko} and Piotr {Romanowski}",
    year = "2016",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06389-9",
    url = "https://www.peterlang.com/document/1049746"
}