Robust Deep Reinforcement Learning for Extractive Legal Summarization. - Duy-Hung Nguyen; Bao-Sinh Nguyen; Nguyen-Viet-Dung Nghiem; Dung Tien Le; Mim Amina Khatun; Minh-Tien Nguyen; Hung Le 002 (ICONIP (6), 2021)