@inproceedings{luu-etal-2026-higraagent, title = "{H}i{G}ra{A}gent: Dual-Agent Adaptive Reasoning over Hierarchical Knowledge Graph for Open Domain Multi-hop Question Answering", author = "Luu, Hung and Nguyen, Long S. T. and Pham, Trung and Pham, Hieu and Quan, Tho", editor = "Demberg, Vera and Inui, Kentaro and Marquez, Llu{\'i}s", booktitle = "Findings of the {A}ssociation for {C}omputational {L}inguistics: {EACL} 2026", month = mar, year = "2026", address = "Rabat, Morocco", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/ingest-eacl/2026.findings-eacl.62/", pages = "1193--1217", ISBN = "979-8-89176-386-9" }