@book { TheInnovatorsDilemma,
    title = "The Innovator's Dilemma",
    subtitle = "Warum etablierte Unternehmen den Wettbewerb um bahnbrechende Innovationen verlieren",
    author = "Clayton M. {Christensen} and Kurt {Matzler} and Stephan {Friedrich von den Eichen}",
    year = "2011",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1190384"
}