Daglis, I. A., Paschalidis, N. P., Sarris, E. T., Axford, W. I., Kremser, G., Wilken, B., & Gloeckler, G. (1991). Statistical features of the substorm expansion-phase as observed by the AMPTE/CCE spacecraft. In J. R., Kan, T. A., Potemra, S., Kokubun, & T., Iijima (Eds.), Magnetospheric Substorms (pp. 323-332). Washington, D. C.: American Geophysical Union.