@article{luckishardtobeatthedifficultyofsports,
  title = {Luck is Hard to Beat: The Difficulty of Sports Prediction},
  author = {Raquel YS Aoki and Renato M Assuncao and Pedro OS Vaz de Melo},
  year = {2017},
  eprint = {1706.02447},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1706.02447v1},
}