@book { PimpyourBrain,
    title = "Pimp your Brain!",
    subtitle = "Die ganzheitliche Fitness-Formel für Gedächtnis und Konzentration. Mit 33 Übungen fürs Gehirn",
    author = "Pepe {Peschel}",
    year = "2020",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/932664"
}