The Appell Function F1 and Regge String Scattering Amplitudes

@article{Lee2014TheAF,
  title={The Appell Function F1 and Regge String Scattering Amplitudes},
  author={Jen-Chi Lee and Yi Yang},
  journal={Physics Letters B},
  year={2014},
  volume={739},
  pages={370-374}
}

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