@article{Torrero:2014x7,
  author = "Torrero, Christian  and  Borisenko, Oleg  and  Kushnir, Vladimir  and  Alles Salom, Bartolome  and  Papa, Alessandro",
  title = "{A new approach to the two-dimensional $\sigma$ model with a topological charge}",
  doi = "10.22323/1.187.0338",
  journal = "PoS",
  year = 2014,
  volume = "LATTICE 2013",
  pages = "338"
}