Wen, Yongyan, Siyuan Li, Rongchang Zuo, Lei Yuan, Hangyu Mao, and Peng Liu. 2025. “SkillTree: Explainable Skill-Based Deep Reinforcement Learning for Long-Horizon Control Tasks”. Proceedings of the AAAI Conference on Artificial Intelligence 39 (20):21491-500. https://doi.org/10.1609/aaai.v39i20.35451.