WASET
    S. Karklina and  I. Erins,  Patents as Indicators of Innovative Environment.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 84(12). 3198 - 3203
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/9996894.