1. For recent reviews see e.g. E.W. Kolb, M. Turner: The early universe Redwood-Addison, Wesley; 1989 J.D. Vergados: Phys. Rep. 133 (1986) 1
2. R. Cowsik, J. McClelland: Phys. Rev. Lett. 29 (1972) 669; J.E. Gunn et al.: Astrophys. J. 223 (1978) 1015
3. S. Tremain, J.E. Gunn: Phys. Rev. Lett. 42 (1979) 407; D.N. Spergel et al.: Phys. Rev. D38 (1988) 2014, have argued that light neutrinos (m v <10 eV) are unlikely to form galactic halos of dwarf and spiral galaxies
4. S.P. Mikheyev, A.Yu Smirnov: JETP 64 (1986) 913; L. Wolfenstein: Phys. Rev. D17 (1978) 2369; S.J. Parke, T.P. Walker: Phys. Rev. Lett 57 (1986) 2322; J.N. Bahcall: Nucl. Phys. (proc. suppl.) B19 (1991) 94.
5. E.g., S.P. Rosen: Neutrino 88, J. Schneps et al. (eds), p. 78, Singapore: World Scientific 1988; E. Fiorini: Neutrino 88, p. 471, Singapore: World Scientific 1988