@article{ontheinitiationofspiralwavesin,
  title = {On the initiation of spiral waves in excitable media},
  author = {S. P. Hastings and M. M Sussman},
  year = {2020},
  eprint = {2005.03425},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2005.03425v4},
}