@book { DerMenschundseineSprachen,
    title = "Der Mensch und seine Sprachen",
    author = "Magdalena {Olpinska-Szkielko} and Sambor {Grucza} and Zofia {Berdychowska} and Jerzy {Zmudzki}",
    year = "2012",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-01336-8",
    url = "https://www.peterlang.com/document/1045910"
}