Wu, Kexin, and Kun Chi. “Enhanced E-Commerce Customer Engagement: A Comprehensive Three-Tiered Recommendation System”. Journal of Knowledge Learning and Science Technology ISSN: 2959-6386 (online), vol. 2, no. 3, Dec. 2023, pp. 348-59, https://doi.org/10.60087/jklst.vol2.n2.p359.