1. Allen, C.W.: 1963, Astrophysical Quantities (3rd edn), University of London, The Athlone Press, p. 161.
2. Bahcall, J.N.: 1989, Neutrino Astrophysics, Cambridge University Press, p. 43.
3. Bai, T., Hoeksema, J.T. and Scherrer, P.H.: 1995, in: J.T. Hoeksema, V. Domingo, B. Fleck and B. Battrick (eds), Helioseismology ESA SP, p. 113.
4. Bai, T.A.: 2002, AAS Meeting 200, No. 91.04.
5. Bai, T.: 2003, ApJ 585, 1114.