1. There are several recent reviews of neutrino mass. See, for example, F. Boehm and P. Vogel, Physics of Massive Neutrinos, (Cambridge Univ. Press, Cambridge, 1987).
2. J.D. Vergados, Phys. Rev. 133, 1 (1986).
3. S.M. Bilenky and S.T. Petcov, Rev. Mod. Phys. 59, 671 (1987).
4. R. Eichler, 1987 Int. Symp. on Lepton and Photon Interactions at High Energies.
5. Under a CP transformation and are essentially CP conju gates.