@book { DerWeihnachtsmannkommt,
    title = "Der Weihnachtsmann kommt",
    author = "Paul {Klein}",
    year = "2013",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955204594",
    url = "https://m.dotbooks.de/document/264377"
}