@article{Brennan:70,
      author        = "Brennan, D.P. and Browning, P.K. and Van der Linden,
                       R.A.M.",
      title         = "{Instabilities and helicity-injection current drive in
                       spherical tokamaks}",
      year          = "2003",
      note          = "Proceedings 29th EPS conference on Controlled Fusion and
                       Plasma Physics, St. Petersburg, 2003",
}