@book { HimbeerschaumundDnentraum,
    title = "Himbeerschaum und Dünentraum",
    author = "Frida Luise {Sommerkorn}",
    year = "2018",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/1375656"
}