@article{Suyama:2019GL,
  author = "Suyama, Takao",
  title = "{$\theta=\pi$ in $SU(N)/Z_N$ Theory}",
  doi = "10.22323/1.340.0619",
  journal = "PoS",
  year = 2019,
  volume = "ICHEP2018",
  pages = "619"
}