@article{Barbero:2013OL,
  author = "Barbero, Fernando  and  Lewandowski, Jerzy  and  Villasenor, Eduardo J. S.",
  title = "{Quantum isolated horizons and black hole entropy}",
  doi = "10.22323/1.140.0023",
  journal = "PoS",
  year = 2013,
  volume = "QGQGS 2011",
  pages = "023"
}