@book { FcherbergreifenderGrundschulunterricht,
    title = "Fächerübergreifender Grundschulunterricht",
    author = "Birgit {Smieja} and Oliver {Weyrauch}",
    year = "2019",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    doi = "10.3726/b15061",
    url = "https://www.peterlang.com/document/1056589"
}