@inproceedings{CTT100698191,
  author = {S. Hatakeyama and M. Soya and H. Tsutsui and S. Tsuji-Iio and R. Shimada and T. Akiyama and K. Y. Watanabe},
  title = {Helical coils for the positional stability and elongation of tokamak plasma},
  booktitle = {Proceedings of 39th EPS Conference on Plasma Physics},
  year = 2011,
}