@misc{duff2006black,
  title={Black hole entropy and quantum information},
  author={M. J. Duff and S. Ferrara},
  year={2006},
  eprint={hep-th/0612036},
  archivePrefix={arXiv},
  primaryClass={hep-th},
  url={https://arxiv.org/abs/hep-th/0612036}
}