Sun, Dasong, Shuqing Li, Wenjing Yan, Fusen Jiao, and Junpeng Chen. 2020. “Research on User Interest Expression and Recommendation Service Based on Three-Dimensional Relationship of Users and Items”. International Journal on Recent and Innovation Trends in Computing and Communication 8 (5):01-15. https://doi.org/10.17762/ijritcc.v8i5.5382.