@misc{morrison2020asymptotic,
  title={Asymptotic analysis of the Boltzmann equation for dark matter relic abundance},
  author={Logan A. Morrison and Hiren H. Patel and Jaryd F. Ulbricht},
  year={2020},
  eprint={2009.04012},
  archivePrefix={arXiv},
  primaryClass={hep-ph},
  doi={10.1088/1475-7516/2021/07/024},
  url={https://arxiv.org/abs/2009.04012}
}