@inproceedings{Sasaki:2014yQ,
  author = "Sasaki, Takahiro",
  title = "{Practical approach to the sign problem at finite theta-vacuum angle}",
  doi = "10.22323/1.187.0137",
  booktitle = "Proceedings of 31st International Symposium on Lattice Field Theory LATTICE 2013 {\textemdash} PoS(LATTICE 2013)",
  year = 2014,
  volume = "187",
  pages = "137"
}