WASET
    Caihong Sun and  Xizi Zhang,  Learning to Recommend with Negative Ratings Based on Factorization Machine.   journal   = {International Journal of Economics and Management Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2017, vol. 129(9). 2235 - 2241
    [viewed 07 May 2024]. Available from: https://publications.waset.org/pdf/10007831.