A Diffusion Equivalent to a Countable Markov Chain.

@article{Feller1956ADE,
  title={A Diffusion Equivalent to a Countable Markov Chain.},
  author={W Feller and H P McKean},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={1956},
  volume={42 6},
  pages={351-4}
}