@article{expounlockinghardreasoningwithselfexplan,
  title = {ExPO: Unlocking Hard Reasoning with Self-Explanation-Guided Reinforcement Learning},
  author = {Ruiyang Zhou and Shuozhe Li and Amy Zhang and Liu Leqi},
  year = {2025},
  eprint = {2507.02834},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2507.02834},
}