@inproceedings{kiet-etal-2025-metamorphic, title = "Metamorphic at {VLSP} 2025: {SIGMA} {--} A Multimodal Agent System for Legal {QA} on {V}ietnamese Traffic Signs", author = "Kiet, Nguyen Tuan and Anh, Nguyen Khanh Tuan and Nguyen, Long Hoang Huu and Tai, Dam Vu Trong and Thin, Dang Van", editor = "Mai, Luong Chi and Huyen, Nguyen Thi Minh and Trang, Nguyen Thi Thu", booktitle = "Proceedings of the 11th International Workshop on Vietnamese Language and Speech Processing", month = oct, year = "2025", address = "Hanoi, Vietnam", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/ingest-luhme/2025.vlsp-1.50/", pages = "418--430" }