@book { Sturm,
    title = "Sturm",
    author = "Wolfgang {Hohlbein} and Dieter {Winkler}",
    year = "2013",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955203955",
    url = "https://m.dotbooks.de/document/233003"
}