Τσάμπρα Μ., and Παλάσκας Θ. Β. “Entrepreneurial Competitiveness in the Knowledge Economy: Factors Defining the Innovativeness of Small and Medium Size Enterprises”. SPOUDAI Journal of Economics and Business, vol. 54, no. 1, Jan. 2004, pp. 59-76, http://spoudai.org/index.php/journal/article/view/412.