@book { MutistAngstpluseinSchritt,
    title = "Mut ist Angst plus ein Schritt",
    author = "Mischa {Miltenberger}",
    year = "2019",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/498564"
}