Proceedings of an International Workshop on Space Plasma Physics Investigations by Cluster and Regatta, 20-22 February 1990, Graz, Austria. pp.161-164, 1990. Paris. ESA Publications Division
Proceedings of an International Workshop on Space Plasma Physics Investigations by Cluster and Regatta, 20-22 February 1990, Graz, Austria. pp.89-90, 1990. Paris. ESA Publications Division