Zeitschriftenartikel
Untiedt, J.; Pellinen, R.; Küppers, F.; Opgenorth, H. J.; Pelster, W. D.; Baumjohann, W.; Ranta, H.; Kangas, J.; Czechowsky, P.; Heikkila, W. J.: Observation of the initial development of an auroral and magnetic substorm at magnetic midnight. Journal Geophysical Research
45, S. 41 - 65 (1978)