@article{Borja:2013kO,
  author = "Borja, Enrique F.  and  Diaz Polo, Jacobo  and  Garay, Iñaki",
  title = "{U(N) and holomorphic methods for LQG and Spin Foams}",
  doi = "10.22323/1.140.0024",
  journal = "PoS",
  year = 2013,
  volume = "QGQGS 2011",
  pages = "024"
}