1. Claverie, A., Isaak, G. R., McLeod, C. P., van der Raay, H. B. & Roca Cortez, T. Nature 282, 591–594 (1979).
2. Grec, G., Fossat, E. & Pomerantz, M. Nature 288, 541–544 (1980).
3. Goldreich, P. & Kumar, P. Astrophys. J. 326, 462–478 (1988).
4. Libbrecht, K. Proc. Symp. Seismology of the Sun and Sun-like Stars, ESA Spec. Pap. 286, 3–10 (European Space Agency, Noordwijk, 1988).
5. Vorontsov, S. V. & Zharkov, V. N. Soviet Sci. Rev. E7, 1–103 (1989).