M. G. Kivelson, K. K. Khurana, S.
Joy, C. T. Russell, D. J.
Southwood, R.
J. Walker, and C. Polanskey
Institute of Geophysics and Planetary Physics
University of California, Los Angeles
Science, Volume 276, pp. 1239-1241, May 23, 1997
Copyright © 1997 by the American Association for the Advancement of Science