@book { KonstruktivismusimLiteraturunterricht,
    title = "Konstruktivismus im Literaturunterricht",
    author = "Markus {Schwahl}",
    year = "2015",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/978-3-653-05286-2",
    url = "https://www.peterlang.com/document/1049283"
}