Pingping Lin and  Xudong Luo and  Yifan Fan,  A Survey of Sentiment Analysis Based on Deep Learning.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2020, vol. 168(12). 473 - 485
    [viewed 17 October 2021]. Available from: https://publications.waset.org/pdf/10011630.