ItemRAG: Retrieval-Augmented Generation with Item-Based Knowledge Computing for E-Commerce Product Question Answering. - Changliang Xu; Yukun Kang; Quan Feng; Jinghua Hua; Piji Li; Feiran Wu; Hu Wei; Xiang Chen 016; Sheng-Jun Huang; Songcan Chen (Big Data Min. Anal., 2026)