@article{fitzhugh1961,
  title={Impulses and Physiological States in Theoretical Models of Nerve Membrane},
  author={Richard Fitzhugh},
  year={1961},
  journal={Biophysical Journal},
  doi={10.1016/s0006-3495(61)86902-6},
  url={https://doi.org/10.1016/s0006-3495(61)86902-6}
}