Ali Hajiha and  Farhad Ghaffari and  Nooshin Gholamali Tehrani,  A Study of the Role of Perceived Risk and User Characteristics in Internet Purchase Intention.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2010, vol. 42(6). 613 - 617
    [viewed 03 April 2020]. Available from: https://publications.waset.org/pdf/1452.