@book { OpportunitiesandDiversificationExpansionofBusinessbyAnalyzingtheStructuralCapitalofEngineeringServiceFirms,
    title = "Opportunities and Diversification - Expansion of Business by Analyzing the Structural Capital of Engineering Service Firms",
    author = "Roberto {Cabezas}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/228201"
}