@article{GreenPorter_1984,
  title={Noncooperative Collusion under Imperfect Price Information},
  author={Green, E. and Porter, R.H.},
  journal={Econometrica},
  volume={52},
  number={1},
  pages={87--100},
  year={1984},
  publisher={Econometric Society}
}
@article{BernheimWhinston_1990,
 title={Multimarket Contact and Collusive Behavior},
  author={Bernheim, B.D. and Whinston, M.D.},
  journal={RAND Journal of Economics},
  volume={21},
  number={1},
  pages={1--26},
  year={1990},
  publisher={The RAND Corporation}
}
