@book { WassuchtdasHerzimHimmel,
    title = "Was sucht das Herz im Himmel?",
    author = "Nadja {Richter-Paul}",
    year = "2021",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/998038"
}