@inproceedings{Mariti:201415,
  author = "Mariti, Marco",
  title = "{Effective theta term by CP-odd electromagnetic background fields.}",
  doi = "10.22323/1.187.0360",
  booktitle = "Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 {\textemdash} PoS(LATTICE 2013)",
  year = 2014,
  volume = "187",
  pages = "360"
}