@misc{W2894564506,
  author = {R. J. Connelly and Elwyn R. Berlekamp and John H. Conway and Richard K. Guy},
  title = {Winning Ways for Your Mathematical Plays.},
  year = {1986},
  howpublished = {American Mathematical Monthly},
  doi = {https://doi.org/10.2307/2323620}
}