@article{Abramowicz:2012Na,
  author = "Abramowicz, Halina",
  title = "{Exclusive Electroproduction of two pions at HERA}",
  doi = "10.22323/1.134.0450",
  journal = "PoS",
  year = 2012,
  volume = "EPS-HEP2011",
  pages = "450"
}