@article{SteinStein1991,
  title={Stock Price Distributions with Stochastic Volatility: An Analytic Approach},
  author={Stein, Elias M. and Stein, Jeremy C.},
  journal={Review of Financial Studies},
  volume={4},
  number={4},
  pages={727--752},
  year={1991},
  publisher={Oxford University Press}
}

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