Hanan Alshaher and  Jinsheng Xu,  1/Sigma Term Weighting Scheme for Sentiment Analysis.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2021, vol. 175(7). 441 - 444
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10012132.