Kyoung-Jae Kim and  Hyunchul Ahn,  Hybrid Recommender Systems using Social Network Analysis.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2012, vol. 64(4). 515 - 518
    [viewed 08 May 2024]. Available from: https://publications.waset.org/pdf/1249.