@article{Faraggi:2016uv,
  author = "Faraggi, A.  and  Rizos, Ioannis",
  title = "{Spinor-vector duality and light Z’ in heterotic strings}",
  doi = "10.22323/1.258.0043",
  journal = "PoS",
  year = 2016,
  volume = "PLANCK 2015",
  pages = "043"
}