WASET
    Ilias A. Makris,  Innovative Activity and Development: Analyzing Firm Data from Eurozone Country-Members.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2015, vol. 106(10). 3435 - 3441
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/10002580.