1. See, for example: G. Fidecaro, Neutrino 81, Proc. Int. Conf. on Neutrino Physics and Astrophysics, Maui, Hawaii, July 1981 (Dept. of Phys. and Astrophys., Honolulu, 1981), p. 246, and references therein.
2. R. Wilson, Proc. First Workshop on Grand Unification, University of New Hampshire, April 1980 (Math. Sci. Press, Brookline, Mass., 1980 ), p. 215.
3. K. Green, Proc. Second Workshop on Grand Unification, University of Michigan, Ann Arbor, April 1981 ( Birkäuser, Basle, 1981 ), p. 98.
4. H.L. Anderson, Proc. Third Workshop on Grand Unification, University of North Carolina, Chapel Hill, April 1982 (Birhäuser, Basle, 1982 ), Progress in Physics, vol. 41, p. 322.
5. Preliminary results concerning the second phase of the Grenoble experiment have been reported at various conferences. See for example G. Puglierin, Int. Colloquium on Matter non Conservation (ICOMAN), Frascati, January 1983 and references quoted.