@inproceedings{Clarke:201648,
  author = "Clarke, J.",
  title = "{How to avoid unnatural hierarchical thermal leptogenesis}",
  doi = "10.22323/1.258.0026",
  booktitle = "Proceedings of 18th International Conference From the Planck Scale to the Electroweak Scale  {\textemdash} PoS(PLANCK 2015)",
  year = 2016,
  volume = "258",
  pages = "026"
}