@book { DesTeufelsMhle,
    title = "Des Teufels Mühle",
    author = "Ottilie {Arndt} and Lydia {Ostermeier}",
    year = "2013",
    publisher = "hey! publishing",
    address = "München, Deutschland",
    doi = "10.3239/9783942822596",
    url = "https://www.heypublishing.com/document/211706"
}