NeuSym-RAG: Hybrid Neural Symbolic Retrieval with Multiview Structuring for PDF Question Answering. - Ruisheng Cao; Hanchong Zhang; Tiancheng Huang; Zhangyi Kang; Yuxin Zhang; Liangtai Sun; Hanqi Li; Yuxun Miao; Shuai Fan 005; Lu Chen 002; Kai Yu 004 (ACL (1), 2025)