@article{Brennan:191,
      author        = "Brennan, D.P. and Browning, P.K. and Van der Linden,
                       R.A.M.",
      title         = "{Instabilities and their role in current drive in
                       helicity-injected spheromaks and spherical tokamaks}",
      year          = "2001",
      note          = "28th EPS Conference on Controlled Fusion and Plasma
                       Physics, Funchal, Portugal, 18-22 June, 2001",
}