An O(16) × O(16) heterotic string

@article{AlvarezGaum1986AnO,
  title={An O(16) × O(16) heterotic string},
  author={Lu{\'i}s Alvarez-Gaum{\'e} and Paul H. Ginsparg and Gregory W. Moore and Cumrun Vafa},
  journal={Physics Letters B},
  year={1986},
  volume={171},
  pages={155-162}
}

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