@book { UniversalgrammatikundFremdsprachendidaktik,
    title = "Universalgrammatik und Fremdsprachendidaktik",
    author = "Aldona {Sopata}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1097516"
}