Yeoman, T. K., Lühr, H., Friedel, R. H. W., Coles, S., Grandé, M., Perry, C. H., Lester, M., Smith, P. N., Singer, H. J., & Orr, D. (1994). CRRES/ground-based multi-instrument observations of an interval of substorm activity. Annales Geophysicae, 12(12), 1158-1173.