Radek Malinský and  Ivan Jelínek,  A Novel Web Metric for the Evaluation of Internet Trends.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2011, vol. 57(9). 1008 - 1011
    [viewed 21 September 2020]. Available from: https://publications.waset.org/pdf/4522.