@article{Suyama:2010AT,
  author = "Suyama, Motohiro  and  Nakamura, Kimitsugu",
  title = "{Recent Progress of Photocathodes for PMTs}",
  doi = "10.22323/1.090.0013",
  journal = "PoS",
  year = 2010,
  volume = "PD09",
  pages = "013"
}