@inproceedings{Boegli:2012vX,
  author = "Boegli, Michael  and  Niedermayer, Ferenc  and  Pepe, Michele  and  Wiese, Uwe-Jens",
  title = "{Study of $\theta$-Vacua in the 2-d $O(3)$ Model}",
  doi = "10.22323/1.164.0228",
  booktitle = "Proceedings of The 30th International Symposium on Lattice Field Theory {\textemdash} PoS(Lattice 2012)",
  year = 2012,
  volume = "164",
  pages = "228"
}