@article{Zhang:276,
      author        = "Zhang, J. and Richardson, I.G. and Webb, D.F. and
                       Gopalswamy, N. and Huttunen, E. and Kasper, J.C. and Nitta,
                       N. V. and Poomvises, W. and Thompson, B. and Wu, C.-C. and
                       Yashiro, S. and Zhukov, A.N.",
      title         = "{Solar and interplanetary sources of major geomagnetic
                       storms (Dst = -100 nT) during 1996-2005}",
      year          = "2007",
}