1. Andersen, B. N., Domingo, V., Jones, A. R., Korzennik, S., Jimenez, A., Palle, P. L., Regulo, C. & Roca Cortes, T. 1988, in Seismology of the Sun and Sun-like Stars, ed. E. J. Rolfe (ESA SP-286; Puerto de la Cruz: ESA), 175
2. The SOHO mission: An overview
3. Frohlich, C. & van der Raay, H. B. 1984, Proc. 4th European Meeting on Solar Physics: The Hydromagnetics of the Sun, ed. T. D. Guyenne & J. J. Hunt (ESA SP-220; Noordwijk: ESA), 17
4. Frohlich, C., etal 1988, in Seismology of the Sun and Sun-like Stars, ed. E. J. Rolfe (ESA SP-286; Puerto de la Cruz: ESA), 359