@inproceedings{Naka:20114B, author = "Naka, Tatsuhiro", title = "{Status of Nuclear Emulsion for Directional Dark Matter Search }", doi = "10.22323/1.110.0040", booktitle = "Proceedings of Identification of Dark Matter 2010 {\textemdash} PoS(IDM2010)", year = 2011, volume = "110", pages = "040" }