WASET
    Kai-Ying A. Chan and  Leon A.G. Oerlemans and  Marthinus W. Pretorius,  Knowledge Flows and Innovative Performances of NTBFs in Gauteng, South Africa: An Attempt to Explain Mixed Findings in Science Park Research.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2010, vol. 42(6). 1440 - 1454
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/13135.