Integrable 2D Lorentzian gravity and random walks

@article{Francesco1999Integrable2L,
  title={Integrable 2D Lorentzian gravity and random walks},
  author={Philippe Di Francesco and Emmanuel Guitter and Charlotte Kristjansen},
  journal={Nuclear Physics},
  year={1999},
  volume={567},
  pages={515-553}
}
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