1. F.J. Hasert et al. , Observation of neutrino-like interactions without muon or electron in the Gargamelle neutrino experiment; Phys. Lett. B 46, 138 (1973)
2. F.J. Hasert et al. , Search for elastic muon-neutrino electron scattering; Phys. Lett. B 46, 121 (1973)
3. S. Weinberg, talk at this Symposium
4. G. Brianti, talk at this Symposium
5. T. Eichten et al. , Phys. Lett. B 46, 274-280 (1973)