@article{Haegeman:2011hy,
  author = "Haegeman, Jutho  and  Cirac, J. Ignacio  and  Osborne, Tobias J.  and  Verschelde, Henri  and  Verstraete, Frank",
  title = "{Applying the variational principle to (1+1) dimensional relativistic quantum field theories}",
  doi = "10.22323/1.117.0029",
  journal = "PoS",
  year = 2011,
  volume = "FacesQCD",
  pages = "029"
}