Huei-Wen Lin,  How Herding Bias Could be Derived from Individual Investor Types and Risk Tolerance?.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2012, vol. 66(6). 1395 - 1400
    [viewed 17 September 2019]. Available from: https://publications.waset.org/pdf/11343.