@article{Naka:20114B,
  author = "Naka, Tatsuhiro",
  title = "{Status of Nuclear Emulsion for Directional Dark Matter Search }",
  doi = "10.22323/1.110.0040",
  journal = "PoS",
  year = 2011,
  volume = "IDM2010",
  pages = "040"
}