@book { MonolingualismBilingualismMultilingualism,
    title = "Monolingualism – Bilingualism – Multilingualism",
    author = "Hanna {Komorowska} and Jarosław {Krajka}",
    year = "2017",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-06729-3",
    url = "https://www.peterlang.com/document/1050118"
}