Turetskyi, A. O., B. M. Vorona, M. A. Vovk, and S. I. Yershova. “Development and Research of Models and Software for the Recommender System of Consumer Goods”. Bulletin of National Technical University "KhPI". Series: System Analysis, Control and Information Technologies, no. 21, Sept. 2018, pp. 70-76, doi:10.20998/2079-0023.2018.21.13.