@book { WasdenktdieMaus,
    title = "Was denkt die Maus?",
    subtitle = "Gesammelte Aufsätze zur Kinderlyrik",
    author = "Heinz-Jürgen {Kliewer}",
    year = "1999",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1088152"
}