@misc{donath2024formalism,
  title={The In-Out Formalism for In-In Correlators},
  author={Yaniv Donath and Enrico Pajer},
  year={2024},
  eprint={2402.05999},
  archivePrefix={arXiv},
  primaryClass={hep-th},
  url={https://arxiv.org/abs/2402.05999}
}