@book { FremdsprachenunterrichtinderGrundschule,
    title = "Fremdsprachenunterricht in der Grundschule",
    author = "Markus {Kötter} and Jutta {Rymarczyk}",
    year = "2014",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05466-8",
    url = "https://www.peterlang.com/document/1044247"
}