@book { GrammarGrowthinChildSecondLanguageGerman,
    title = "Grammar Growth in Child Second Language German",
    subtitle = "Investigating DP Development in an Immersion Setting",
    author = "Christiane {Schöneberger}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05135-3",
    url = "https://www.peterlang.com/document/1050374"
}