Reference. Let's verify step by step [lightman2023verify]

✍️source

@article{lightman2023verify,
  title = {Let's Verify Step by Step},
  author = {Lightman, Hunter and Kosaraju, Vineet and Burda, Yura and Edwards, Harri and Baker, Bowen and Lee, Teddy and Leike, Jan and Schulman, John and Sutskever, Ilya and Cobbe, Karl},
  journal = {arXiv preprint arXiv:2305.20050},
  year = {2023},
  url = {https://arxiv.org/abs/2305.20050}
}