@article{Kłusek-Gawenda:2017sY,
  author = "Kłusek-Gawenda, Mariola  and  Szczurek, Antoni",
  title = "{$\gamma\gamma \to \gamma \gamma$ scattering in ultrarelativistic UPC}",
  doi = "10.22323/1.314.0446",
  journal = "PoS",
  year = 2017,
  volume = "EPS-HEP2017",
  pages = "446"
}