@book { PrinzEisenherzoderDasMittelalterinderSprechblase,
    title = "Prinz Eisenherz oder: Das Mittelalter in der Sprechblase",
    author = "Hubert {Mittler}",
    year = "2008",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105018"
}