@book { MarketingstrategienfrInnovationen,
    title = "Marketingstrategien für Innovationen",
    subtitle = "Fallstudien von mittelständischen Unternehmen",
    author = "Diana {Grosse} and Robert {Ullmann} and Enrico {Weyh}",
    year = "2007",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1102854"
}