1. Aellig, M. R.: 1998, Freeze-in Temperatures and Relative Abundances of Iron Ions in the Solar Wind Measured with SOHO/CELIAS/CTOF, Ph. D. thesis, University of Bern.
2. Aellig, M. R., Grünwaldt, H., Bochsler, P., Wurz, P., Hefti, S., Kallenbach, R., Ipavich, F. M. et al.: 1998, ‘Iron Freeze-in Temperatures Measured by SOHO/CELIAS/MTOF’, J. Geophys. Res. 103, 17,215–17,222.
3. Balogh, A. and von Steiger, R.: 1998, ‘The Heliosphere at Solar Minimum: Ulysses Observations During Its Fast Latitude Scan in 1994–95’, Rev. Geophys., submitted.
4. Bochsler, P., Hovestadt, D., Gruenwaldt, H., Hilchenbach, M., Ipavich, F. et al.: 1997, ‘The Sun at Minimum Activity: Results from the CELIAS Experiment on SOHO’, Proc. 5th SOHO Workshop, Vol. 404 of ESA SP, Oslo, Norway, 17–20 June, pp. 37–43.
5. Borrini, G., Gosling, J. T., Bame, S. J., Feldman, W. C. and Wilcox, J. M.: 1981, ‘Solar Wind Helium and Hydrogen Structure Near the Heliospheric Current Sheet: A Signal of Coronal Streamers at 1 AU’, J. Geophys. Res. 86, 4565–4573.