1. Allen, C.W., 1973, Astrophysical Quantities, Athlone Press, London
2. Byrne, P.B.: 1987, in “Cool Stars, Stellar Systems and the Sun”, eds. J.L. Linsky & R.E. Stencel, Springer, p. 491
3. Byrne, P.B., Mathioudakis, M., 1993, Physics of Solar and Stellar Coronae, eds. J.L.Linsky & S. Serio, Kluwer, p. 435
4. Byrne, P.B., Mathioudakis, M., Young, A., Skumanich, A., 1994, Cool Stars, Stellar Systems and the Sun, ed. J-P. Caillault, ASP Conf. Ser. No. 64, p. 375
5. Byrne, P.B., Panagi, P.M., Lanzafame, A.C., Avgoloupis, S., Huenemoerder, D.H., Kilkenny, D., Marang, F., Panov, K.P., Roberts, G., Seiradakis, J.H., van Wyk, F.: 1995, A&A, 299, 115